_SendMessage

[BackHomeAgain]

For the active window I want to determine if the mouse click is on the title bar and not somewhere else in the window.

Here's my attempt using the _SendMessage function:

If _SendMessage($hWnd, $WM_NCLBUTTONDOWN, $WM_NCHITTEST, $HTCAPTION, 4) <> 0 Then

Test passed

Else

Test failed

EndIf

The problem is that the test always passes.

It would appear that I am doing something wrong or making incorrect assumptions?

I have used the WinGetPos($hWnd) function to calculate the title bar area, but if I could just find this area

using the _SendMessage function or some other function if that is not correct, it would save a lot of calculation.

Also, the various title bar buttons could be checked.

[wolf9228]

For the active window I want to determine if the mouse click is on the title bar and not somewhere else in the window.

Here's my attempt using the _SendMessage function:

If _SendMessage($hWnd, $WM_NCLBUTTONDOWN, $WM_NCHITTEST, $HTCAPTION, 4) <> 0 Then

Test passed

Else

Test failed

EndIf

The problem is that the test always passes.

It would appear that I am doing something wrong or making incorrect assumptions?

I have used the WinGetPos($hWnd) function to calculate the title bar area, but if I could just find this area

using the _SendMessage function or some other function if that is not correct, it would save a lot of calculation.

Also, the various title bar buttons could be checked.

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
 
$Gui = GUICreate("My GUI") 
GUIRegisterMsg($WM_NCLBUTTONDOWN, "WM_NCLBUTTONDOWN")
GUISetState(@SW_SHOW) 
Global $Test = False
While 1
$msg = GUIGetMsg()
If $msg = $GUI_EVENT_CLOSE Then ExitLoop
If $Test = True Then MsgBox(0,"MSG","passed")
$Test = False
WEnd
GUIDelete()

Func WM_NCLBUTTONDOWN($hWnd, $Msg, $wParam, $lParam)
$Test = True
Return $GUI_RUNDEFMSG
EndFunc

[BackHomeAgain]

The example works fine for a new window, but what about for an existing window, in this case the active window?

I have spent much time on the documentation, examples, and forum discussions with some frustration.

The _SendMessage function appears to be what I need.

If I pass in the handle for the active window and the appropriate message parameter, it should work?

I patterned my code after the _SendMessage function example.

#include <SendMessage.au3>

#include <WindowsConstants.au3>

$hWnd = WinGetHandle("[ACTIVE]")

_SendMessage($hWnd, $WM_NCLBUTTONDOWN)

If NOT @error Then

The title bar area was selected.

Else

The mouse was in some other part of the window.

EndIf

What am I missing?

[wolf9228]

The example works fine for a new window, but what about for an existing window, in this case the active window?

I have spent much time on the documentation, examples, and forum discussions with some frustration.

The _SendMessage function appears to be what I need.

If I pass in the handle for the active window and the appropriate message parameter, it should work?

I patterned my code after the _SendMessage function example.

#include <SendMessage.au3>

#include <WindowsConstants.au3>

$hWnd = WinGetHandle("[ACTIVE]")

_SendMessage($hWnd, $WM_NCLBUTTONDOWN)

If NOT @error Then

The title bar area was selected.

Else

The mouse was in some other part of the window.

EndIf

What am I missing?

expandcollapse popup

#include <WinAPI.au3>
#include <WindowsConstants.au3>
#include <StructureConstants.au3>
#include <Misc.au3>
HotKeySet("{ESC}", "Terminate")
$dll = DllOpen("user32.dll")



While 1
if MouseProc() Then  MsgBox(0,"MSG","Pressed")
WEnd


Func MouseProc()
$L = MouseGetPos(0)
$T = MouseGetPos(1)
$sR = _WinAPI_GetSystemMetrics(0)
$sB = _WinAPI_GetSystemMetrics(1)
$Handle = WinGetHandle("[active]")
$WINDOWINFO = GetWindowInfo($Handle)
$cxWindowBorders = DllStructGetData($WINDOWINFO,"cxWindowBorders")
$cyWindowBorders = DllStructGetData($WINDOWINFO,"cyWindowBorders")
$RECT = _WinAPI_GetWindowRect($Handle)
$CRECT = _WinAPI_GetClientRect($Handle)
$iL = DllStructGetData($RECT,"Left")
$iT = DllStructGetData($RECT,"Top")
$iR = DllStructGetData($RECT,"Right")
$iB = DllStructGetData($RECT,"Bottom")
If $iL < 0 Then $iL = 0
If $iT < 0 Then $iT = 0
if $iR > $sR Then $iR = $sR
if $iB > $sB Then $iB = $sB
$CL = DllStructGetData($CRECT,"Left")
$CT = DllStructGetData($CRECT,"Top")
$CR = DllStructGetData($CRECT,"Right")
$CB = DllStructGetData($CRECT,"Bottom")
If $CL < 0 Then $CL = 0
If $CT < 0 Then $CT = 0
if $CR > $sR Then $CR = $sR
if $CB > $sB Then $CB = $sB
if $L >= $iL And $L <= $iR And $T < ($iB - $CB - $cxWindowBorders) Then 
if _IsPressed("01", $dll) Then Return True 
Else
Return False
EndIf
EndFunc

Func Terminate()
    Exit 0
EndFunc



Func GetWindowInfo($hwnd)
$Tag_struct = "DWORD cbSize;LONG IL;LONG IT;LONG IR;LONG IB;LONG CL;LONG CT;LONG CR;LONG CB;" & _
"DWORD dwStyle;DWORD dwExStyle;DWORD dwWindowStatus;UINT cxWindowBorders;UINT cyWindowBorders;" & _
"int atomWindowType;WORD wCreatorVersion"
$WINDOWINFO = DllStructCreate($Tag_struct)
DllStructSetData($WINDOWINFO,"cbSize",DllStructGetSize($WINDOWINFO))
$LPWINDOWINFO = DllStructGetPtr($WINDOWINFO)
DllCall("User32.dll" ,"int","GetWindowInfo","HWND",$hwnd,"ptr",$LPWINDOWINFO)
Return $WINDOWINFO
EndFunc

Edited May 27, 2010 by wolf9228

[BackHomeAgain]

The script displays the window coordinates at the top left corner of the window and will update itself when the window is dragged

across the screen. The script works for both window content and no content mode.

The issue that I am trying to resolve is not to display the coordinates if any of the title bar buttons are pressed.

The example checks for the minimize button. If it was not pressed, the coordinates will be displayed. But, it is not working.

If one changes "If @error to NOT @error", the coordinates are displayed regardless where the title bar was selected.

Any help would be much appreciated.

expandcollapse popup

#Include <Misc.au3>
#include <WinAPI.au3>
#include <Constants.au3>
#include <WindowsConstants.au3>
#include <StructureConstants.au3>
#include <SendMessage.au3>

While 1
    GUIGetMsg()
    $hWnd = WinGetHandle("[ACTIVE]")
    $title = WinGetTitle($hWnd)
    $coord = WinGetPos($hWnd)

    If NOT _IsPressed("01", "user32.dll") Then
       Local $fp = 0, $b = 0, $c = 0
       ToolTip("")
    Else
        If $title <> "Program Manager" AND $title <> "" Then
            $BarInfo = _GetTitleBarInfo($hWnd)
            $bH = DllStructGetData($BarInfo, "Bottom") - DllStructGetData($BarInfo, "Top")
            $x1 = $coord[0]
            $y1 = $coord[1]
            $xW = $coord[2]
            $yH = $coord[3]
            $x2 = $x1+$xW
            $y2 = $y1+$yH
            $yT = $y1+$bH
            $mc = MouseGetCursor()
            $Cx = MouseGetPos(0)
            $Cy = MouseGetPos(1)

            If $fp = 0 Then $fp = 1
            If $fp = 1 Then         ;First pass
                $fp += 1
                If $mc = $IDC_ARROW Then
                    If $Cx >= $x1 AND $Cx <= $x2 AND $Cy >= $y1 AND $Cy <= $yT Then
                        _SendMessage($hWnd, $WM_NCLBUTTONDOWN, $WM_NCHITTEST, $HTMINBUTTON)

                        If @error Then  ;Title bar minimize button was not selected
                            $b = $Cx-$x1
                            $c = $Cy-$y1
                        EndIf
                    EndIf
                EndIf
            EndIf

            If $b <> 0 Then
                $x1 = $Cx-$b
                $y1 = $Cy-$c
                $XY = " X:" & $x1 & "   Y:" & $y1
                ToolTip($XY, $x1, $y1, "", 0, 4)
            EndIf
        EndIf
    EndIf
WEnd

Func _GetTitleBarInfo($hwnd)
    $Tag_struct = "DWORD cbSize;" & $tagRECT & ";DWORD rgstate[6]"
    $BarInfo = DllStructCreate($Tag_struct)
    DllStructSetData($BarInfo, "cbSize", DllStructGetSize($BarInfo))
    DllCall("User32.dll", "int", "GetTitleBarInfo", "HWND",$hwnd, "ptr",DllStructGetPtr($BarInfo))
    Return $BarInfo
EndFunc