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Catching WM_INPUT - hWnd not being set

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IErrors

I am working on some functionality to detect whether a standard keyboard was used for input in my UI or if a barcode scanner (that acts like a keyboard) was used. Instead of dealing with a scanner SDK, I decided I would read from the raw input to get device info and make a determination.

I discovered while testing with multiple UIs is that when the WM_INPUT message is received and the function called, the $hWnd param is always the same (apparently whatever handle I set the "hTarget" to in the RAWINPUTDEVICE struct).

Is this normal behavior??

Using the test code below, no matter what window you give input to the $hWnd param never changes.

#include <WindowsConstants.au3>
#include <GUIConstantsEx.au3>
#include <WinAPISys.au3>

$Form1 = GUICreate("Form 1", 300, 300, -1, 10)
ConsoleWrite("$Form1 = " & $Form1 & @CRLF)
$Edit1 = GUICtrlCreateEdit("", 0, 0, 300, 300)
GUISetState(@SW_SHOW, $Form1)

$Form2 = GUICreate("Form 2", 300, 300, -1, 350)
ConsoleWrite("$Form2 = " & $Form2 & @CRLF)
$Edit2 = GUICtrlCreateEdit("", 0, 0, 300, 300)
GUISetState(@SW_SHOW, $Form2)

GUIRegisterMsg($WM_INPUT, "WM_INPUT")          ; https://msdn.microsoft.com/en-us/library/ms645590(v=vs.85).aspx

$tRID = DllStructCreate($tagRAWINPUTDEVICE)    ; https://msdn.microsoft.com/en-us/library/ms645565(v=vs.85).aspx
DllStructSetData($tRID, "UsagePage", 1)
DllStructSetData($tRID, "Usage", 6)
DllStructSetData($tRID, "Flags", 0)
DllStructSetData($tRID, "hTarget", $Form1)     ; According to the struct def, if hTarget=NULL then it should follow keyboard focus. - nope :(

$pRID = DllStructGetPtr($tRID)
_WinAPI_RegisterRawInputDevices($pRID)         ; https://msdn.microsoft.com/en-us/library/ms645600(v=vs.85).aspx

Do
Until GUIGetMsg() = $GUI_EVENT_CLOSE

Func WM_INPUT($hWnd, $iMsg, $wParam, $lParam)
  ConsoleWrite("hWnd = " & $hWnd & " | Title = " & WinGetTitle($hWnd) & @CRLF)
  ConsoleWrite("Active Window = " & WinGetTitle("[ACTIVE]") & @CRLF)
    Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_INPUT

 

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IErrors
Just now, mikell said:

Of course! That's how I am doing it and it works just fine! - Thanks.

I was wondering if the $hWnd param of the WM_INPUT message handler should reflect the actual window handle the message was received in, because it stays the same no matter what form I type in. :(

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mikell

Wrong way IMHO to get the window handle. The $hWnd param will always return the registered hTarget value

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LarsJ

IErrors, Yes, this is normal behaviour. $hWnd param of the WM_INPUT message reflects the window handle the message is send to. As mikell has already explained. Your WM_INPUT message handler should look like this:

Func WM_INPUT($hWnd, $iMsg, $wParam, $lParam)
  If $hWnd = WinGetHandle("[ACTIVE]") Then
    ConsoleWrite("hWnd = " & $hWnd & " | Title = " & WinGetTitle($hWnd) & @CRLF)
    ConsoleWrite("Active Window = " & WinGetTitle("[ACTIVE]") & @CRLF)
  EndIf
  Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_INPUT

 

GUIRegisterMsg is able to catch messages which are send to a GUI. If you set the value of hTarget parameter to null, the WM_INPUT messages are send directly to the control which has the keybord focus. In this case either $Edit1 or $Edit2. To catch these messages you have to use subclassing in this way:

#include <WindowsConstants.au3>
#include <GUIConstantsEx.au3>
#include <WinAPIShellEx.au3>
#include <WinAPISys.au3>

$Form1 = GUICreate("Form 1", 300, 300, -1, 10)
ConsoleWrite("$Form1 = " & $Form1 & @CRLF)
$Edit1 = GUICtrlCreateEdit("", 0, 0, 300, 300)
$hEdit1 = GUICtrlGetHandle( $Edit1 )
GUISetState(@SW_SHOW, $Form1)

$pEdit1Callback = DllCallbackGetPtr( DllCallbackRegister( "Edit1Callback", "lresult", "hwnd;uint;wparam;lparam;uint_ptr;dword_ptr" ) )
_WinAPI_SetWindowSubclass( $hEdit1, $pEdit1Callback, 9999, 0 )

$Form2 = GUICreate("Form 2", 300, 300, -1, 350)
ConsoleWrite("$Form2 = " & $Form2 & @CRLF)
$Edit2 = GUICtrlCreateEdit("", 0, 0, 300, 300)
$hEdit2 = GUICtrlGetHandle( $Edit2 )
GUISetState(@SW_SHOW, $Form2)

$pEdit2Callback = DllCallbackGetPtr( DllCallbackRegister( "Edit2Callback", "lresult", "hwnd;uint;wparam;lparam;uint_ptr;dword_ptr" ) )
_WinAPI_SetWindowSubclass( $hEdit2, $pEdit2Callback, 9998, 0 )

GUIRegisterMsg($WM_INPUT, "WM_INPUT")          ; https://msdn.microsoft.com/en-us/library/ms645590(v=vs.85).aspx

$tRID = DllStructCreate($tagRAWINPUTDEVICE)    ; https://msdn.microsoft.com/en-us/library/ms645565(v=vs.85).aspx
DllStructSetData($tRID, "UsagePage", 1)
DllStructSetData($tRID, "Usage", 6)
DllStructSetData($tRID, "Flags", 0)
;DllStructSetData($tRID, "hTarget", $Form1)     ; According to the struct def, if hTarget=NULL then it should follow keyboard focus. - nope :(
DllStructSetData($tRID, "hTarget", 0)          ; It indeed does follow keyboard focus

$pRID = DllStructGetPtr($tRID)
_WinAPI_RegisterRawInputDevices($pRID)         ; https://msdn.microsoft.com/en-us/library/ms645600(v=vs.85).aspx

Do
Until GUIGetMsg() = $GUI_EVENT_CLOSE

_WinAPI_RemoveWindowSubclass( $Edit1, $pEdit1Callback, 9999 )
_WinAPI_RemoveWindowSubclass( $Edit2, $pEdit2Callback, 9998 )

Func WM_INPUT($hWnd, $iMsg, $wParam, $lParam)
  If $hWnd = WinGetHandle("[ACTIVE]") Then
    ConsoleWrite("hWnd = " & $hWnd & " | Title = " & WinGetTitle($hWnd) & @CRLF)
    ConsoleWrite("Active Window = " & WinGetTitle("[ACTIVE]") & @CRLF)
  EndIf
  Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_INPUT

Func Edit1Callback( $hWnd, $iMsg, $wParam, $lParam, $iSubclassId, $pData )
  Switch $iMsg
    Case $WM_INPUT
      ConsoleWrite("Edit1Callback" & @CRLF)
      ConsoleWrite("    hWnd = " & $hWnd & " | Title = " & WinGetTitle($hWnd) & @CRLF)
      ConsoleWrite("    Active Window = " & WinGetTitle("[ACTIVE]") & @CRLF)
  EndSwitch

  ; Call next function in subclass chain
  Return DllCall( "comctl32.dll", "lresult", "DefSubclassProc", "hwnd", $hWnd, "uint", $iMsg, "wparam", $wParam, "lparam", $lParam )[0]
  #forceref $iSubclassId, $pData
EndFunc

Func Edit2Callback( $hWnd, $iMsg, $wParam, $lParam, $iSubclassId, $pData )
  Switch $iMsg
    Case $WM_INPUT
      ConsoleWrite("Edit2Callback" & @CRLF)
      ConsoleWrite("    hWnd = " & $hWnd & " | Title = " & WinGetTitle($hWnd) & @CRLF)
      ConsoleWrite("    Active Window = " & WinGetTitle("[ACTIVE]") & @CRLF)
  EndSwitch

  ; Call next function in subclass chain
  Return DllCall( "comctl32.dll", "lresult", "DefSubclassProc", "hwnd", $hWnd, "uint", $iMsg, "wparam", $wParam, "lparam", $lParam )[0]
  #forceref $iSubclassId, $pData
EndFunc

 

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IErrors

Thank you both Mikell & LarsJ!

I figured it had to do with the registered hTarget, but I wanted to make sure I wasn't doing it wrong.

I was able to get the active window and control handle in the message handler of my actual code - although very fumbly.

I hadn't thought of creating individual callbacks for each control - This is a great! Thank you for demonstrating the correct way of doing this.

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      #include-once #include <WinAPI.au3> #include <WinAPIGdi.au3> #include <WinAPISys.au3> #include <GUIConstantsEx.au3> #include <WindowsConstants.au3> ;~ #Include <windows.bi> Global Const $_tagRect = "struct;long left;long top;long right;long bottom;endstruct" Global Const $_tagSize = "struct;long cx;long cy;endstruct" Global Const $_tagGradient_Rect = "struct;ulong UpperLeft;ulong LowerRight;endstruct" Global Const $_tagPoint = "struct;long x;long y;endstruct" Global Const $_tagTrivertex = "struct;long x;long y;int Red;int Greed;int Blue;int Alpha;endstruct" Global Const $_tagPaintStruct = "struct;handle hdc;bool fErase;long left;long top;long right;long bottom;bool fRestore;bool fIncUpdate;byte rgbReserved[32];endstruct" Global Const $_tagWNDCLASSEX = "struct;uint cbSize;uint style;ptr lpfnWndProc;int cbClsExtra;int cbWndExtra;ptr hInstance;ptr hIcon;" & _ "ptr hCursor; ptr hbrBackground; ptr lpszMenuName;ptr lpszClassName;ptr hIconSm;endstruct" Global Const $CS_VREDRAW = 0x0001, $CS_HREDRAW =0x0002, $CS_GLOBALCLASS = 0x4000 Global Const $BN_CLICKED = 0 ;~ #Define _RGB(r,g,b) BGR(b,g,r) Global Const $GRADIENT_FILL_RECT_H = 0 Global Const $GRADIENT_FILL_RECT_V = 1 ;~ Dim Shared hInstance As HINSTANCE ;~ ' This dll is located in Windows directory ;~ DECLARE FUNCTION Gradientfill Lib "MSIMG32" ALIAS "GradientFill" _ ;~ (hDC AS HDC, pVertex As PTRIVERTEX, dwNumVertex As Integer,pMesh AS PGRADIENT_RECT, dwNumMesh As Integer, dwMode As Integer) As Integer ;~ '******************************************************************** ;~ ' A FB Control Template ;~ '******************************************************************** ;~ Declare Function NiceButt(ByVal hWnd as HWND,byval Msg as UINT,byval wParam as WPARAM,byval lParam as LPARAM) as LRESULT ;~ Declare FUNCTION IsMouseOver (hWnd As HWND )As Integer ;~ Declare SUB Draw_Gradient (hdc as HDC, x As Integer, y As integer, w As integer, h As Integer, r As integer, g As integer, b As integer) ;~ Declare FUNCTION Register_NiceButt()As Integer #cs ' 'Windows calls this function when the dll is loaded. /'Function DllMain alias "MAIN"(byval hModule as HMODULE,byval reason as Integer,byval lpReserved as LPVOID) as BOOL Select case reason case DLL_PROCESS_ATTACH hInstance=hModule Register_NiceButt() MessageBox(GetActiveWindow(),"OK","OK",MB_OK) Return 0 case DLL_PROCESS_DETACH ' end select return True end function '/ #ce #Region ### START Koda GUI section ### Form= $Form1 = GUICreate("Form1", 615, 437, 192, 124) RegisterButton() Global $Ctrl = _winapi_CreateWindowEx(0, "TestButton", "Test", BitOR($WS_VISIBLE, $WS_CHILD), 10, 10, 80, 30, $Form1) ConsoleWrite(@CRLF & $Ctrl) GUISetState(@SW_SHOW) _WinAPI_UpdateWindow($Form1) #EndRegion ### END Koda GUI section ### While 1 $nMsg = GUIGetMsg() Switch $nMsg Case $GUI_EVENT_CLOSE Exit EndSwitch WEnd Func RegisterButton() Local $hDll = DllCallbackRegister('TestButtonProc', 'lresult', 'hwnd;uint;wparam;lparam') ;~ DIM wc AS WNDCLASSEX ;~ DIM szClassName As String Local $sClass = "TestButton" Local $wc = DllStructCreate($_tagWNDCLASSEX & ';wchar szClassName[' & (StringLen($sClass) + 1) & ']') ;~ szClassName = "NiceButt" ;~ wc.cbSize = SIZEOF(WNDCLASSEX) $wc.cbSize = DllStructGetPtr($wc, 'szClassName') - DllStructGetPtr($wc) ;~ wc.style = CS_HREDRAW OR CS_VREDRAW OR CS_GLOBALCLASS $wc.style = BitOR($CS_HREDRAW, $CS_VREDRAW, $CS_GLOBALCLASS) ;~ wc.hInstance = GetmoduleHandle(0) 'hInstance $wc.hInstance = _WinAPI_GetModuleHandle(0) ;~ wc.hbrBackground = Cast(HBRUSH,COLOR_BTNFACE+1) ;/// $wc.hbrBackground = _WinAPI_CreateSolidBrush(_WinAPI_GetSysColor($COLOR_BTNFACE)) ;~ wc.lpszClassName = StrPtr(szClassName) $wc.lpszClassName = DllStructGetPtr($wc, 'szClassName') ;~ wc.lpfnWndProc = @NiceButt $wc.lpfnWndProc = DllCallbackGetPtr($hDll) ;~ wc.cbClsExtra = 0 $wc.cbClsExtra = 0 ;~ wc.cbWndExtra = 0 $wc.cbWndExtra = 0 ;~ wc.hIcon = 0 $wc.hIcon = 0 ;~ wc.hCursor = 0 $wc.hCursor = 0 ;~ wc.lpszMenuName = 0 $wc.lpszMenuName = 0 ;~ wc.hIconSm = 0 $wc.hIconSm = 0 $wc.szClassName = $sClass ;~ FUNCTION = RegisterClassEx(@wc) Local $aRet = _WinAPI_RegisterClassEx($wc) Return $aRet ;~ END FUNCTION EndFunc ;******************************************************************** ; Custom Control Procedure ;******************************************************************** ;~ Function NiceButt(ByVal hWnd as HWND,byval Msg as UINT,byval wParam as WPARAM,byval lParam as LPARAM) as LRESULT Func TestButtonProc($hWnd, $iMsg, $wParam, $lParam) Static $bBtnDown, $bMouseOver, $hCaptured Switch $iMsg Case $WM_CREATE Local $Rct = DllStructCreate($_tagRect) Local $iX, $iY, $iW, $iH $bBtnDown = False GetClientRect($hWnd, $Rct) $iX = $Rct.left $iY = $Rct.top $iW = $Rct.right - $Rct.left $iH = $Rct.bottom - $Rct.top InvalidateRect($hWnd, 0, False) ;~ EXIT FUNCTION ;~ Return 0 Case $WM_PAINT Local $ps ;= DllStructCreate($_tagPaintStruct) Local $hPen, $hBrush, $hOldBrush Dim $Rct = DllStructCreate($_tagRect) Dim $Size = DllStructCreate($_tagSize) Dim $T = "", $i Dim $XCtr, $YCtr Dim $iX, $iY, $iW, $iH Dim $iR, $iG, $iB GetClientRect($hWnd, $Rct) $iX = $Rct.left $iY = $Rct.top $iW = $Rct.right - $Rct.left $iH = $Rct.bottom - $Rct.top $XCtr = ($Rct.left + $Rct.right) / 2 $YCtr = ($Rct.top + $Rct.bottom) / 2 ;~ GetWindowText(hWnd,T ,255) ' Grab a copy of control caption ;~ DllCall("user32.dll", "int", "GetWindowTextW", "hwnd", $hWnd, "LPTSTR ", $T, "int", 255) ; not work $T = "Test" ;********************************** ; Draw our control ;********************************** Local $hDC = BeginPaint($hWnd, $ps) ;~ GetTextExtentPoint32(hDC, T , LEN(T),@Size) ' Get caption size GetTextExtentPoint32($hDC, $T, StringLen($T), $Size) $iR = 30 $iG = 90 $iB = 90 Draw_Gradient($hDC, $iX, $iY, $iW, $iH, $iR, $iG, $iB) SetBkMode($hDC, $TRANSPARENT) If $bBtnDown Then ;~ SetTextColor(hDC,_RGB(255,0,0)) SetTextColor($hDC, Dec(0xFF0000)) TextOut($hDC, $XCtr-($Size.cx/2)+1, $YCtr-($Size.cy/2)+1, $T) Else ;~ SetTextColor(hDC,_RGB(0,0,255)) SetTextColor($hDC, Dec(0x0000FF)) TextOut($hDC, $XCtr-$Size.cx/2, $YCtr-$Size.cy/2, $T) EndIf EndPaint($hWnd, $ps) ;~ EXIT FUNCTION ;~ Return 0 Case $WM_LBUTTONUP If $hWnd = $hCaptured Then ReleaseCapture() $bBtnDown = False InvalidateRect($hWnd, 0, 0) Local $hParent = GetParent($hWnd) ;~ SendMessage(hParent,WM_COMMAND,MAKELONG(GetWindowLong(hWnd,GWL_ID), BN_CLICKED),Cast(LONG,hWnd)) DllCall("user32.dll", "LRESULT", "SendMessageW", _ "hwnd", $hParent, _ "uint", $WM_COMMAND, _ "WPARAM", _WinAPI_MakeLong(_WinAPI_GetWindowLong($hWnd, $GWL_ID), $BN_CLICKED), _ "LPARAM", $hWnd) EndIf ;~ EXIT FUNCTION Return 0 Case $WM_LBUTTONDOWN SetCapture($hWnd) $hCaptured = $hWnd $bBtnDown = True SetFocus($hWnd) InvalidateRect($hWnd, 0, False) ;~ EXIT FUNCTION Return 0 Case $WM_MOUSEMOVE If $bBtnDown Then If IsMouseOver($hWnd) Then $bBtnDown = True InvalidateRect($hWnd, 0, False) ELSE ReleaseCapture() $bBtnDown = False InvalidateRect($hWnd, 0, False) EndIf EndIf ;~ EXIT FUNCTION ;~ Return 0 Case $WM_MOVING ReleaseCapture() $bBtnDown = False InvalidateRect($hWnd, 0, False) ;~ EXIT FUNCTION ;~ Return 0 Case $WM_SIZE ReleaseCapture() $bBtnDown = False InvalidateRect($hWnd, 0, False) ;~ EXIT FUNCTION ;~ Return 0 EndSwitch ;~ Return _WinAPI_DefWindowProc($hWnd, $iMsg, $wParam, $lParam) Return DllCall("user32.dll", "lresult", "DefWindowProcW", "hwnd", $hWnd, "uint", $iMsg, "wparam", $wParam, _ "lparam", $lParam)[0] EndFunc ;~ SUB Draw_Gradient (hdc as HDC, x As Integer, y As integer, w As integer, h As Integer, r As integer, g As integer, b As integer) Func Draw_Gradient($hDC, $iX, $iY, $iW, $iH, $iR, $iG, $iB) ;~ DIM Vert(2) AS TRIVERTEX Local $Vert[2] $Vert[0] = DllStructCreate($_tagTrivertex) $Vert[1] = DllStructCreate($_tagTrivertex) ;~ DIM Rect AS GRADIENT_RECT Local $Rect = DllStructCreate($_tagGradient_Rect) ;~ Vert (0).x = 0 $Vert[0].x = 0 ;~ Vert (0).y = 0 $Vert[0].y = 0 ;~ Vert (0).Red = 65535-(65535-(r*256)) $Vert[0].Red = 65535-(65535-($iR*256)) ;~ Vert (0).Green = 65535-(65535-(g*256)) $Vert[0].Green = 65535-(65535-($iG*256)) ;~ Vert (0).Blue = 65535-(65535-(b*256)) $Vert[0].Blue = 65535-(65535-($iB*256)) ;~ Vert (0).Alpha = 0 $Vert[0].Alpha = 0 ;~ '****************************************************** ;~ Vert (1).x = w $Vert[1].x = $iW ;~ Vert (1).y = h/2 $Vert[1].y = $iH/2 ;~ Vert (1).Red = 65535-(65535-(255*256)) $Vert[1].Red = 65535-(65535-(255*256)) ;~ Vert (1).Green = 65535-(65535-(255*256)) $Vert[1].Green = 65535-(65535-(255*256)) ;~ Vert (1).Blue = 65535-(65535-(255*256)) $Vert[1].Blue = 65535-(65535-(255*256)) ;~ Vert (1).Alpha = 0 $Vert[1].Alpha = 0 ;~ '****************************************************** ;~ Rect.UpperLeft = 0 $Rect.UpperLeft = 0 ;~ Rect.LowerRight = 1 $Rect.LowerRight = 1 ;~ '****************************************************** ;~ Gradientfill(hdc,@Vert(0),2,@Rect,1,GRADIENT_FILL_RECT_V) GradientFill($hDC, $Vert[0], 2, $Rect, 1, $GRADIENT_FILL_RECT_V) ;~ '****************************************************** ;~ Vert (0).x = 0 $Vert[0].x = 0 ;~ Vert (0).y = h/2 $Vert[0].y = $iH/2 ;~ Vert (0).Red = 65535-(65535-(255*256)) $Vert[0].Red = 65535-(65535-(255*256)) ;~ Vert (0).Green = 65535-(65535-(255*256)) $Vert[0].Green = 65535-(65535-(255*256)) ;~ Vert (0).Blue = 65535-(65535-(255*256)) $Vert[0].Blue = 65535-(65535-(255*256)) ;~ Vert (0).Alpha = 0 $Vert[0].Alpha = 0 ;~ '****************************************************** ;~ Vert (1).x = w $Vert[1].x = $iW ;~ Vert (1).y = h $Vert[1].y = $iH ;~ Vert (1).Red = 65535-(65535-(r*256)) $Vert[1].Red = 65535-(65535-($iR*256)) ;~ Vert (1).Green = 65535-(65535-(g*256)) $Vert[1].Green = 65535-(65535-($iG*256)) ;~ Vert (1).Blue = 65535-(65535-(b*256)) $Vert[1].Blue = 65535-(65535-($iB*256)) ;~ Vert (1).Alpha = 0 $Vert[1].Alpha = 0 ;~ '****************************************************** ;~ Rect.UpperLeft = 0 $Rect.UpperLeft = 0 ;~ Rect.LowerRight = 1 $Rect.LowerRight = 1 ;~ '****************************************************** ;~ Gradientfill(hdc,@Vert(0),2,@Rect,1,GRADIENT_FILL_RECT_V) GradientFill($hDC, $Vert[0], 2, $Rect, 1, $GRADIENT_FILL_RECT_V) ;~ END SUB EndFunc Func IsMouseOver($hWnd) Local $Rect = DllStructCreate($_tagRect) Local $Pt = DllStructCreate($_tagPoint) GetWindowRect ($hWnd, $Rect) GetCursorPos($Pt) Return PtInRect($Rect, $Pt) EndFunc Func _RGB($iR, $iG, $iB) Return ('0x' & Hex($iR, 2) & Hex($iG, 2) & Hex($iB, 2)) EndFunc Func _BGR($iB, $iG, $iR) Return ('0x' & Hex($iB, 2) & Hex($iG, 2) & Hex($iR, 2)) EndFunc Func InvalidateRect($hWnd, $tRECT = 0, $bErase = True) DllCall("user32.dll", "bool", "InvalidateRect", "hwnd", $hWnd, "struct*", $tRECT, "bool", $bErase) EndFunc Func SetFocus($hWnd) DllCall("user32.dll", "hwnd", "SetFocus", "hwnd", $hWnd) EndFunc Func PtInRect($tRect, $tPoint) Local $aRet = DllCall("user32.dll", "bool", "PtInRect", "ptr", DllStructGetPtr($tRect), "struct*", $tPoint) If IsArray($aRet) Then Return $aRet[0] Return False EndFunc Func GetWindowRect($hWnd, ByRef $tRect) DllCall("user32.dll", "bool", "GetWindowRect", "hwnd", $hWnd, "struct*", $tRect) EndFunc Func GetCursorPos(ByRef $tPoint) DllCall("user32.dll", "bool", "GetCursorPos", "struct*", $tPoint) EndFunc Func SetCapture($hWnd) DllCall("user32.dll", "hwnd", "SetCapture", "hwnd", $hWnd) EndFunc Func ReleaseCapture() DllCall("user32.dll", "bool", "ReleaseCapture") EndFunc Func SetTextColor($hDC, $iColor) DllCall("gdi32.dll", "INT", "SetTextColor", "handle", $hDC, "INT", $iColor) EndFunc Func BeginPaint($hWnd, ByRef $tPAINTSTRUCT) $tPAINTSTRUCT = DllStructCreate($tagPAINTSTRUCT) Local $aRet = DllCall('user32.dll', 'handle', 'BeginPaint', 'hwnd', $hWnd, 'struct*', $tPAINTSTRUCT) If @error Then Return SetError(@error, @extended, 0) Return $aRet[0] EndFunc Func GetTextExtentPoint32($hDC, $sText, $iTextLen, ByRef $tSize) DllCall("gdi32.dll", "bool", "GetTextExtentPoint32W", "handle", $hDC, "wstr", $sText, "int", $iTextLen, "struct*", $tSize) EndFunc Func GradientFill($hDC, $tVertex, $nVertex, $tMesh, $nMesh, $ulMode) DllCall("Msimg32.dll", "BOOL", "GradientFill", _ "handle", $hDC, _ "struct*", $tVertex, _ "ulong", $nVertex, _ "struct*", $tMesh, _ "ulong", $nMesh, _ "ulong", $ulMode) EndFunc Func GetParent($hWnd) Local $aResult = DllCall("user32.dll", "hwnd", "GetParent", "hwnd", $hWnd) If @error Then Return SetError(@error, @extended, 0) Return $aResult[0] EndFunc Func SetBkMode($hDC, $iBkMode) Local $aResult = DllCall("gdi32.dll", "int", "SetBkMode", "handle", $hDC, "int", $iBkMode) If @error Then Return SetError(@error, @extended, 0) Return $aResult[0] EndFunc Func EndPaint($hWnd, ByRef $tPAINTSTRUCT) Local $aRet = DllCall('user32.dll', 'bool', 'EndPaint', 'hwnd', $hWnd, 'struct*', $tPAINTSTRUCT) If @error Then Return SetError(@error, @extended, False) Return $aRet[0] EndFunc Func GetClientRect($hWnd, ByRef $tRect) Local $aRet = DllCall("user32.dll", "bool", "GetClientRect", "hwnd", $hWnd, "struct*", $tRect) If @error Or Not $aRet[0] Then Return SetError(@error + 10, @extended, 0) Return $tRect EndFunc Func TextOut($hDC, $iX, $iY, $sText, $iTextLen = Default) If $iTextLen = Default Then $iTextLen = StringLen($sText) DllCall('gdi32.dll', 'bool', 'TextOutW', 'handle', $hDC, 'int', $iX, 'int', $iY, 'wstr', $sText, 'int', $iTextLen) EndFunc  
    • r0ash
      By r0ash
      Hey guys, MattDiesel over Stackoverflow mentioned this beautiful piece of code 
      #include <WindowsConstants.au3> #include <WinAPI.au3> Local $IDM_FONT = 33 Local $hWindow = WinGetHandle("Untitled - Notepad") _WinAPI_PostMessage($hWindow, $WM_COMMAND, $IDM_FONT, 0) Local $hFontWin = WinWait("Font") $select = ControlCommand($hFontWin, "", "ComboBox1", "GetCurrentSelection", "") WinClose($hFontWin) MsgBox(0,"", $select) I realized that _WinAPI_PostMessage can trigger menu click event, even if Notepad is minimized.
      How do we know what is the decimal value of *any menu item or sub-menu item*? How we know "Format > Font" menu-item is 33 as wParam to _WinAPI_PostMessage()? Have a look at snapshot.
      Regards.

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