Auto-Resize discrepancy

[RobertKipling]

Whenever I size a text box to the size of the window to be auto-resized later, why must I define two heights (one for Windows XP and one for XP classic and older OSes) ?

If @OSVersion = "WIN_XP" Then
    $txtMain = GUICtrlCreateEdit("",1,1,400,293)
Else
    $txtMain = GUICtrlCreateEdit("",1,1,400,300)
EndIf

This is what I have to do with the code; of course, if someone is using Windows XP classic mode, then the window appears improperly. What can I do to ensure that the text box is always the same size as the inside of the window?

[Zedna]

Use WinGetClientSize()

Look here

[GaryFrost]

might look at GUIResizeMode option and GUICtrlSetResizing

[RobertKipling]

Thank you, this works! I finally figured this out, can't wait to implement it now. (I've never actually seen this before, and I've been through two versions of VB before I found AutoIt...)

#include <GUIConstants.au3>

$gui = GUICreate("my gui",400,300)
$size = WinGetClientSize($gui)
$label = GUICtrlCreateEdit("",0,0,$size[0],$size[1])

GUISetState()

While 1
    $msg = GUIGetMsg()
    If $msg = $GUI_EVENT_CLOSE Then Exit
        
WEnd