function syntax help

[dantay9]

I am trying to find out if the cursor is over a child window of my gui. I found ChildWindowFromPoint, but the script errors out and has to close unexpectedly. Am I using the syntax correctly? $GUI[0] is the parent window and $GUI[1] is the child. If you need the full code, I will post that too.

Here's the website: http://msdn.microsoft.com/en-us/library/ms632676(VS.85).aspx

You can also try RealChildWindowFromPoint

Func _GetHoverWindow()
       Local $Coords = DllStructCreate($tagPOINT)
       $Parent_Pos = WinGetPos($GUI[0])
       $Mouse_Pos = MouseGetPos()
       $Mouse_Pos[0] -= $Parent_Pos[0]
       $Mouse_Pos[1] -= $Parent_Pos[1]
       DllStructSetData($Coords, "X", $Mouse_Pos[0]); Populate Structure
       DllStructSetData($Coords, "Y", $Mouse_Pos[1]); Populate Structure
   
       Return DllCall("user32.dll", "hwnd", "ChildWindowFromPoint", "hwnd", WinGetHandle($GUI[0]), "ptr", DllStructGetPtr($Coords))
   EndFunc;==>_GetHoverWindow

Edited June 11, 2009 by dantay9

[dantay9]

Nobody knows? Is there another way to get the handle of the window that the cursor is over. It has to also get the handle of child guis, and not return the handle to the parent gui.

[martin]

Nobody knows? Is there another way to get the handle of the window that the cursor is over. It has to also get the handle of child guis, and not return the handle to the parent gui.

Searching didn't work then?

[trancexx]

You are doing several things wrong (having both syntax and semantics errors). First is that DllCall returns array so it would be:

Local $aCall = DllCall("user32.dll", "hwnd", "ChildWindowFromPoint", ...
Return $aCall[0]

Another thind is that you are calling that function wrong. MSDN is not saying pointer anywhere. It should be like this:

Local $aCall = DllCall("user32.dll", "hwnd", "ChildWindowFromPoint", "hwnd", $hGui, "int", DllStructGetData($Coords, 1), "int", DllStructGetData($Coords, 2))

Third thing is that you don't need WinGetHandle() - see above.

edit:

actually you don't need to create that structure anyway, just supply ChildWindowFromPoint call with coordinates directly.

Edited June 11, 2009 by trancexx

[dantay9]

Thanks for the help. I am new to dll calls. I should be more careful to the exact wording of MSDN.