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Added WM_NOTIFY to my code to handle events from a couple controls (Toolbar button clicks and Treeview events) Simply defining WM_NOTIFY and putting in the function makes my GUI go crazy when I resize it, more so when I maximize. If I comment out all the WM_NOTIFY code - it resizes and runs correctly. Any advice? (The code below runs correctly, to see the problem uncomment the WM_NOTIFY function.) Edit**** I have verified that this isn't anything inside of the WM_NOTIFY function. It is simply the function itself. If you uncomment only the function, the force ref, the return and the endfunc. It will still produce the same issue when you maximize / resize the window. #Region Includes #include <winapi.au3> #include <WinAPIEx.au3> #include <GuiToolbar.au3> #include <GuiImageList.au3> #include <GUIConstants.au3> #include <GuiConstantsEx.au3> #include <WindowsConstants.au3> #include <GUITab.au3> #include <GuiTreeView.au3> #EndRegion AutoItSetOption('MouseCoordMode', 2) GUIRegisterMsg($WM_SIZE, "WM_SIZE") ;~ GUIRegisterMsg($WM_NOTIFY, "_WM_NOTIFY") #Region Vars ;Only Tested on Win7 64 machine Local $fIconsLoc1 = "imageres.dll" Local $fIconsLoc2 = "Resources\Icons\Undo.ico" Global $aStrings[12] Local $iNew,$iBrowse,$iEdit,$iDelete,$iSave,$iPrint Global Enum $e_new =1000, $e_edit, $e_delete, $e_save, $e_print, $e_undo Global $aOffsets_1, $aOffsets_inner1,$aOffsets_inner2 Global $iItem, $cTreeView1, $cTreeView2 ; Icon Index from DLL $iNew = 2 ;$iBrowse = 202 $iEdit = 111 $iDelete = 84 $iSave = 23 $iPrint = 46 $iGuiWidth = 660 $iGUIHeight = 320 $DividerOffset = 250 Global $aOffsets_1[2],$aOffsets_inner1[2],$aOffsets_inner2[2] $BkColor = 0xf0f0f0 ;Create Form, Toobar and ImageList $hGui = GUICreate("EDM and CNC Schedule",$iGuiWidth,$iGUIHeight,-1,-1, BitOR($WS_OVERLAPPEDWINDOW, $WS_POPUP,$WS_CLIPCHILDREN)) _WinAPI_SetClassLongEx($hGui, $GCL_STYLE, BitAND(_WinAPI_GetClassLongEx($hGui, $GCL_STYLE), BitNOT(1), BitNOT(2))) GUISetState() Global $hToolbar1 = _GUICtrlToolbar_Create($hGui) $imgs = _GUIImageList_Create(32,32,5) ; change first 2 params to Size the icons accordingly. #EndRegion Vars #Region Toolbar ;Populate Image List _GUIImageList_AddIcon($imgs, $fIconsLoc1,$iNew,True) _GUIImageList_AddIcon($imgs, $fIconsLoc1,$iEdit,True) _GUIImageList_AddIcon($imgs, $fIconsLoc1,$iDelete,True) _GUIImageList_AddIcon($imgs, $fIconsLoc1,$iSave,True) _GUIImageList_AddIcon($imgs, $fIconsLoc1,$iPrint,True) _GUIImageList_AddIcon($imgs, $fIconsLoc2,0,True) ;Add Text to Buttons in Toolbar $aStrings[0] = _GUICtrlToolbar_AddString($hToolbar1, "&New") $aStrings[1] = _GUICtrlToolbar_AddString($hToolbar1, "&Edit") $aStrings[2] = _GUICtrlToolbar_AddString($hToolbar1, "&Delete") $aStrings[3] = _GUICtrlToolbar_AddString($hToolbar1, "&Save") $aStrings[4] = _GUICtrlToolbar_AddString($hToolbar1, "&Print") $aStrings[5] = _GUICtrlToolbar_AddString($hToolbar1, "&Undo") ;Set Imagelist of Toolbar to my ImageList $t = _GUICtrlToolbar_SetImageList($hToolbar1, $imgs) ;Add buttons to toolbar $cBtn_New = _GUICtrlToolbar_AddButton($hToolbar1, $e_new, 0,$aStrings[0]) $cBtn_Edit =_GUICtrlToolbar_AddButton($hToolbar1, $e_edit, 1,$aStrings[1]) $cBtn_Delete =_GUICtrlToolbar_AddButton($hToolbar1, $e_delete, 2,$aStrings[2]) $cBtn_Save =_GUICtrlToolbar_AddButton($hToolbar1, $e_save, 3,$aStrings[3]) $cBtn_Print =_GUICtrlToolbar_AddButton($hToolbar1, $e_print, 4,$aStrings[4]) $cBtn_Undo =_GUICtrlToolbar_AddButton($hToolbar1, $e_undo, 5,$aStrings[5]) GUISetState() #EndRegion Toolbar #Region Create Tabs $hGui1 = GUICreate("",$iGuiWidth-10,$iGUIHeight-70,-1,60, $WS_POPUP, $WS_EX_MDICHILD, $hgui) ; Create top level Tab Items $hTab1 = GUICtrlCreateTab(-1,1,665,265) GUICtrlSetResizing(-1, BitOR($GUI_DOCKLEFT, $GUI_DOCKTOP, $GUI_DOCKBOTTOM, $GUI_DOCKWIDTH,$GUI_DOCKRIGHT)) $hTab1_0 = GUICtrlCreateTabItem("Schedule1") ;cTreeView 1 $cTreeView1 = GUICtrlCreateTreeView(0, 25, 245, 225, BitOR($TVS_HASBUTTONS, $TVS_HASLINES, $TVS_LINESATROOT, $TVS_SHOWSELALWAYS), $WS_EX_CLIENTEDGE) GUICtrlSetResizing(-1,BitOR($GUI_DOCKLEFT, $GUI_DOCKTOP, $GUI_DOCKBOTTOM, $GUI_DOCKWIDTH)) ;Set TreeView Data $generalitem = GUICtrlCreateTreeViewItem("parent1", $cTreeView1) GUICtrlSetColor(-1, 0x0000C0) $displayitem = GUICtrlCreateTreeViewItem("parent2", $cTreeView1) GUICtrlSetColor(-1, 0x0000C0) GUICtrlCreateTreeViewItem("node1", $generalitem) GUICtrlCreateTreeViewItem("node2", $generalitem) GUICtrlCreateTreeViewItem("node3", $generalitem) GUICtrlCreateTreeViewItem("node4", $displayitem) GUICtrlCreateTreeViewItem("node5", $displayitem) GUICtrlSetState($generalitem, BitOR($GUI_EXPAND, $GUI_DEFBUTTON)) GUICtrlSetState($displayitem, BitOR($GUI_EXPAND, $GUI_DEFBUTTON)) GUISetState() $hTab1_1 = GUICtrlCreateTabItem("Schedule2 ") ;cTreeView 2 $cTreeView2 = GUICtrlCreateTreeView(0, 25, 245, 225, BitOR($TVS_HASBUTTONS, $TVS_HASLINES, $TVS_LINESATROOT, $TVS_SHOWSELALWAYS),$WS_EX_CLIENTEDGE) GUICtrlSetResizing(-1,BitOR($GUI_DOCKLEFT, $GUI_DOCKTOP, $GUI_DOCKBOTTOM, $GUI_DOCKWIDTH)) $generalitem = GUICtrlCreateTreeViewItem("parent1a", $cTreeView2) GUICtrlSetColor(-1, 0x0000C0) $displayitem = GUICtrlCreateTreeViewItem("parent2a", $cTreeView2) GUICtrlSetColor(-1, 0x0000C0) GUICtrlCreateTreeViewItem("node1", $generalitem) GUICtrlCreateTreeViewItem("node2", $generalitem) GUICtrlCreateTreeViewItem("node3", $generalitem) GUICtrlCreateTreeViewItem("node4", $displayitem) GUICtrlCreateTreeViewItem("node5", $displayitem) GUICtrlSetState($generalitem, BitOR($GUI_EXPAND, $GUI_DEFBUTTON)) ; Expand the "General"-item and paint in bold GUICtrlSetState($displayitem, BitOR($GUI_EXPAND, $GUI_DEFBUTTON)) ; Expand the "Display"-item and paint in bold. GUICtrlCreateTabItem("") GUISetState() ;Create Inner GUI to hold the listviews for first tab $hGuiInner1 = GUICreate("", 403, 225, 252,28, $WS_POPUP, $WS_EX_MDICHILD, $hgui1) $hTab2 = GUICtrlCreateTab(0,0,403,225) $hTab2_0 = GUICtrlCreateTabItem("1 ") $ListView5 = GUICtrlCreateListView("col1|col2|col3", 0, 20, 403, 205) GUICtrlSetResizing(-1, BitOR($GUI_DOCKLEFT, $GUI_DOCKTOP, $GUI_DOCKBOTTOM, $GUI_DOCKRIGHT)) $hTab2_1 = GUICtrlCreateTabItem("2") $ListView6 = GUICtrlCreateListView("col1|col2|col3", 0, 20, 403, 205) GUICtrlSetResizing(-1, BitOR($GUI_DOCKLEFT, $GUI_DOCKTOP, $GUI_DOCKBOTTOM, $GUI_DOCKRIGHT)) GUICtrlCreateTabItem("") GUISetState() ;Create Inner GUI to hold the listviews for second tab $hGuiInner2 = GUICreate("", 403, 225, 252,28, $WS_POPUP, $WS_EX_MDICHILD, $hgui1) $hTab3 = GUICtrlCreateTab(0,0,403,225) $hTab3_0 = GUICtrlCreateTabItem("1") $ListView7 = GUICtrlCreateListView("col1|col2|col3", 0, 20, 403, 205) GUICtrlSetResizing(-1, BitOR($GUI_DOCKLEFT, $GUI_DOCKTOP, $GUI_DOCKBOTTOM, $GUI_DOCKRIGHT)) $hTab3_1 = GUICtrlCreateTabItem("2") $ListView8 = GUICtrlCreateListView("col1|col2|col3", 0, 20, 403, 205) GUICtrlSetResizing(-1, BitOR($GUI_DOCKLEFT, $GUI_DOCKTOP, $GUI_DOCKBOTTOM, $GUI_DOCKRIGHT)) $hTab3_2 = GUICtrlCreateTabItem("3") $ListView9 = GUICtrlCreateListView("col1|col2|col3", 0, 20, 403, 205) GUICtrlSetResizing(-1, BitOR($GUI_DOCKLEFT, $GUI_DOCKTOP, $GUI_DOCKBOTTOM, $GUI_DOCKRIGHT)) $hTab3_3 = GUICtrlCreateTabItem("4") $ListView10 = GUICtrlCreateListView("col1|col2|col3", 0, 20, 403, 205) GUICtrlSetResizing(-1, BitOR($GUI_DOCKLEFT, $GUI_DOCKTOP, $GUI_DOCKBOTTOM, $GUI_DOCKRIGHT)) $hTab3_4 = GUICtrlCreateTabItem("5") $ListView11 = GUICtrlCreateListView("col1|col2|col3", 0, 20, 403, 205) GUICtrlSetResizing(-1, BitOR($GUI_DOCKLEFT, $GUI_DOCKTOP, $GUI_DOCKBOTTOM, $GUI_DOCKRIGHT)) GUICtrlCreateTabItem("") GUISetState() $aOffsets_1 = _GetGuiOffset($hGUI1) $aOffsets_inner1 = _GetGuiOffset($hGuiInner1) $aOffsets_inner2 = _GetGuiOffset($hGuiInner2) #EndRegion End tabs #Region GUI Message Loop While 1 $idMsg = GUIGetMsg() Switch $idMsg Case $GUI_EVENT_CLOSE Exit Case $htab1 Switch GUICtrlRead($htab1) Case 0 ; Adjust child GUIs accordingly GUISetState(@SW_HIDE, $hGuiInner1) GUISetState(@SW_SHOW, $hGuiInner2) Case 1 GUISetState(@SW_HIDE, $hGuiInner2) GUISetState(@SW_SHOW, $hGuiInner1) EndSwitch EndSwitch WEnd #EndRegion GUI Message Loop #Region Functions Func WM_SIZE($hWndGUI, $MsgID, $wParam, $lParam) _WinAPI_SetWindowPos($hgui1, 0, 0, 0, _WinAPI_LoWord($lParam)-$aOffsets_1[0]+16, _WinAPI_HiWord($lParam)-$aOffsets_1[1]+38,BitOR($SWP_NOMOVE, $SWP_NOZORDER)) _WinAPI_SetWindowPos($hGuiInner1, 0, 0, 0, _WinAPI_LoWord($lParam)-$aOffsets_inner1[0]+16, _WinAPI_HiWord($lParam)-$aOffsets_inner1[1]+38,BitOR($SWP_NOMOVE, $SWP_NOZORDER)) _WinAPI_SetWindowPos($hGuiInner2, 0, 0, 0, _WinAPI_LoWord($lParam)-$aOffsets_inner2[0]+16, _WinAPI_HiWord($lParam)-$aOffsets_inner2[1]+38,BitOR($SWP_NOMOVE, $SWP_NOZORDER)) Return $GUI_RUNDEFMSG EndFunc ;==> WM_SIZE ; WM_NOTIFY event handler ;~ Func _WM_NOTIFY($hWndGUI, $MsgID, $wParam, $lParam) ;~ #forceref $hWndGUI, $MsgID, $wParam ;~ Local $tNMHDR, $event, $hwndFrom, $icode, $i_idNew, $dwFlags, $lResult, $idFrom, $i_idOld, $sButtonName, $hTreeView1, $hTreeView2 ;~ Local $tNMTOOLBAR, $tNMTBHOTITEM ;~ $tNMHDR = DllStructCreate($tagNMHDR, $lParam) ;~ $hwndFrom = DllStructGetData($tNMHDR, "hWndFrom") ;~ $idFrom = DllStructGetData($tNMHDR, "IDFrom") ;~ $icode = DllStructGetData($tNMHDR, "Code") ;~ $hTreeview1 = $cTreeView1 ;~ $hTreeview2 = $cTreeView2 ;~ If Not IsHWnd($cTreeView1) Then $hTreeview1 = GUICtrlGetHandle($cTreeView1) ;~ If Not IsHWnd($cTreeView2) Then $hTreeview2 = GUICtrlGetHandle($cTreeView2) ;~ Switch $hwndFrom ;~ Case $hToolbar1 ;~ Switch $icode ;~ Case $NM_LDOWN ;~ ;case for which button was clicked ;~ Switch $iItem ;~ Case $e_new ;~ _button_Click($e_new) ;~ Case $e_edit ;~ _button_Click($e_edit) ;~ Case $e_save ;~ _button_Click($e_save) ;~ Case $e_delete ;~ _button_Click($e_delete) ;~ Case $e_print ;~ _button_Click($e_print) ;~ Case $e_undo ;~ _button_Click($e_undo) ;~ EndSwitch ;~ Case $TBN_HOTITEMCHANGE ;~ $tNMTBHOTITEM = DllStructCreate($tagNMTBHOTITEM, $lParam) ;~ $i_idOld = DllStructGetData($tNMTBHOTITEM, "idOld") ;~ $i_idNew = DllStructGetData($tNMTBHOTITEM, "idNew") ;~ $iItem = $i_idNew ;~ $dwFlags = DllStructGetData($tNMTBHOTITEM, "dwFlags") ;~ EndSwitch ;~ Case $hTreeView1, $hTreeView2 ;~ Switch $icode ;~ Case $NM_CLICK ; The user has clicked the left mouse button within the control ;~ _DebugPrint("$NM_CLICK" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _ ;~ "-->IDFrom:" & @TAB & $iDFrom & @CRLF & _ ;~ "-->Code:" & @TAB & $iCode) ;~ ; Return 1 ; nonzero to not allow the default processing ;~ Return 0 ; zero to allow the default processing ;~ Case $NM_DBLCLK ; The user has double-clicked the left mouse button within the control ;~ _DebugPrint("$NM_DBLCLK" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _ ;~ "-->IDFrom:" & @TAB & $iDFrom & @CRLF & _ ;~ "-->Code:" & @TAB & $iCode) ;~ ; Return 1 ; nonzero to not allow the default processing ;~ Return 0 ; zero to allow the default processing ;~ Case $NM_RCLICK ; The user has clicked the right mouse button within the control ;~ _DebugPrint("$NM_RCLICK" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _ ;~ "-->IDFrom:" & @TAB & $iDFrom & @CRLF & _ ;~ "-->Code:" & @TAB & $iCode) ;~ ; Return 1 ; nonzero to not allow the default processing ;~ Return 0 ; zero to allow the default processing ;~ Case $NM_RDBLCLK ; The user has double-clicked the right mouse button within the control ;~ _DebugPrint("$NM_RDBLCLK" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _ ;~ "-->IDFrom:" & @TAB & $iDFrom & @CRLF & _ ;~ "-->Code:" & @TAB & $iCode) ;~ ; Return 1 ; nonzero to not allow the default processing ;~ Return 0 ; zero to allow the default processing ;~ Case $NM_KILLFOCUS ; control has lost the input focus ;~ _DebugPrint("$NM_KILLFOCUS" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _ ;~ "-->IDFrom:" & @TAB & $iDFrom & @CRLF & _ ;~ "-->Code:" & @TAB & $iCode) ;~ ; No return value ;~ Case $NM_RETURN ; control has the input focus and that the user has pressed the key ;~ _DebugPrint("$NM_RETURN" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _ ;~ "-->IDFrom:" & @TAB & $iDFrom & @CRLF & _ ;~ "-->Code:" & @TAB & $iCode) ;~ ; Return 1 ; nonzero to not allow the default processing ;~ Return 0 ; zero to allow the default processing ;~ ; Case $NM_SETCURSOR ; control is setting the cursor in response to a WM_SETCURSOR message ;~ ; Local $tInfo = DllStructCreate($tagNMMOUSE, $lParam) ;~ ; $hWndFrom = HWnd(DllStructGetData($tInfo, "hWndFrom")) ;~ ; $iIDFrom = DllStructGetData($tInfo, "IDFrom") ;~ ; $iCode = DllStructGetData($tInfo, "Code") ;~ ; _DebugPrint("$NM_SETCURSOR" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _ ;~ ; "-->IDFrom:" & @TAB & $iIDFrom & @CRLF & _ ;~ ; "-->Code:" & @TAB & $iCode & @CRLF & _ ;~ ; "-->ItemSpec:" & @TAB & DllStructGetData($tInfo, "ItemSpec") & @CRLF & _ ;~ ; "-->ItemData:" & @TAB & DllStructGetData($tInfo, "ItemData") & @CRLF & _ ;~ ; "-->X:" & @TAB & DllStructGetData($tInfo, "X") & @CRLF & _ ;~ ; "-->Y:" & @TAB & DllStructGetData($tInfo, "Y") & @CRLF & _ ;~ ; "-->HitInfo:" & @TAB & DllStructGetData($tInfo, "HitInfo")) ;~ ; Return 0 ; to enable the control to set the cursor ;~ ; Return 1 ; nonzero to prevent the control from setting the cursor ;~ Case $NM_SETFOCUS ; control has received the input focus ;~ _DebugPrint("$NM_SETFOCUS" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _ ;~ "-->IDFrom:" & @TAB & $iDFrom & @CRLF & _ ;~ "-->Code:" & @TAB & $iCode) ;~ ; No return value ;~ Case $TVN_BEGINDRAGA, $TVN_BEGINDRAGW ;~ _DebugPrint("$TVN_BEGINDRAG") ;~ Case $TVN_BEGINLABELEDITA, $TVN_BEGINLABELEDITW ;~ _DebugPrint("$TVN_BEGINLABELEDIT") ;~ Case $TVN_BEGINRDRAGA, $TVN_BEGINRDRAGW ;~ _DebugPrint("$TVN_BEGINRDRAG") ;~ Case $TVN_DELETEITEMA, $TVN_DELETEITEMW ;~ _DebugPrint("$TVN_DELETEITEM") ;~ Case $TVN_ENDLABELEDITA, $TVN_ENDLABELEDITW ;~ _DebugPrint("$TVN_ENDLABELEDIT") ;~ Case $TVN_GETDISPINFOA, $TVN_GETDISPINFOW ;~ _DebugPrint("$TVN_GETDISPINFO") ;~ Case $TVN_GETINFOTIPA, $TVN_GETINFOTIPW ;~ _DebugPrint("$TVN_GETINFOTIP") ;~ Case $TVN_ITEMEXPANDEDA, $TVN_ITEMEXPANDEDW ;~ _DebugPrint("$TVN_ITEMEXPANDED") ;~ Case $TVN_ITEMEXPANDINGA, $TVN_ITEMEXPANDINGW ;~ _DebugPrint("$TVN_ITEMEXPANDING") ;~ Case $TVN_KEYDOWN ;~ _DebugPrint("$TVN_KEYDOWN") ;~ Case $TVN_SELCHANGEDA, $TVN_SELCHANGEDW ;~ _DebugPrint("$TVN_SELCHANGED") ;~ Case $TVN_SELCHANGINGA, $TVN_SELCHANGINGW ;~ _DebugPrint("$TVN_SELCHANGING") ;~ Case $TVN_SETDISPINFOA, $TVN_SETDISPINFOW ;~ _DebugPrint("$TVN_SETDISPINFO") ;~ Case $TVN_SINGLEEXPAND ;~ _DebugPrint("$TVN_SINGLEEXPAND") ;~ EndSwitch ;~ EndSwitch ;~ Return $GUI_RUNDEFMSG ;~ EndFunc Func _GetGuiOffset($hTargGUI) Local $aGUIPos[4] $aWin1 = WinGetPos($hGUI) $aWin2 = WinGetPos($hTargGUI) $aGUIPos[0] = $aWin1[2]-$aWin2[2] $aGUIPos[1] = $aWin1[3]-$aWin2[3] return $aGUIPos EndFunc ;==> _GetGuiOffset func _button_Click($btn_ID) Switch $btn_ID Case $e_new _DebugPrint("Clicked New button" & @LF) case $e_edit _DebugPrint("Clicked Edit button" & @LF) Case $e_save _DebugPrint("Clicked Save button" & @LF) Case $e_delete _DebugPrint("Clicked Delete button" & @LF) Case $e_print _DebugPrint("Clicked Print button" & @LF) Case $e_undo _DebugPrint("Clicked Undo button" & @LF) EndSwitch endfunc ;==>_button_Click Func _DebugPrint($s_Text , $sLine = @ScriptLineNumber) ConsoleWrite( _ "!===========================================================" & @CRLF & _ "+======================================================" & @CRLF & _ "-->Line(" & StringFormat("%04d", $sLine) & "):" & @TAB & $s_Text & @CRLF & _ "+======================================================" & @CRLF) EndFunc ;==>_DebugPrint #EndRegion functions

Hello everyone. I want to run a function when a GUI window is resized. However, when I click to resize the GUI, before I actually drag the corner of the GUI it runs and prevents me from resizing the GUI. I was hoping that I would be able to make this message run once the GUI has finished running. Would this be possible? Thanks Edit I have solved it. The answer: GUISetOnEvent($GUI_EVENT_RESIZED, 'WM_SIZE', $hWnd)