GDI Problem

[MadaraUchiha]

Hey,

I tried drawing a line on my GUI like this:

#include <ButtonConstants.au3>
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <GuiConstantsEx.au3>
#include <GDIPlus.au3>


$Form1 = GUICreate("Form1", 404, 350, 192, 124)
$Button1 = GUICtrlCreateButton("Go", 8, 8, 75, 25)
GUISetState(@SW_SHOW)



While 1
    $nMsg = GUIGetMsg()
    Switch $nMsg
        Case $GUI_EVENT_CLOSE
            Exit
        Case $Button1
            $Hwnd = WinGetHandle($Form1)
            _GDIPlus_Startup()
            $hGraphics = _GDIPlus_GraphicsCreateFromHWND($Hwnd)
            _GDIPlus_GraphicsDrawLine($hGraphics,50,50,50,50)
    EndSwitch
WEnd

But nothing happens? Why is that? ;o

[JLogan3o13]

Your parameters for GraphicsDrawLine are incorrect. Try this:

#include <ButtonConstants.au3>
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <GuiConstantsEx.au3>
#include <GDIPlus.au3>


$Form1 = GUICreate("Form1", 404, 350, 192, 124)
$Button1 = GUICtrlCreateButton("Go", 8,8,75,25)
GUISetState(@SW_SHOW)

While 1
    $nMsg = GUIGetMsg()
    Switch $nMsg
        Case $GUI_EVENT_CLOSE
            ExitLoop
        Case $Button1
            _GDIPlus_Startup()
            $hGraphics = _GDIPlus_GraphicsCreateFromHWND($Form1)
            _GDIPlus_GraphicsDrawLine($hGraphics,10,150,390,150)
    EndSwitch
WEnd

[MadaraUchiha]

Yes, that works, but after minimizing and then restoring the GDI Stuff dissapeared from the GUI?

How can I prevent this?

[AZJIO]

>GraphGDIPlus

Maybe will help you understand

Func _GraphGDIPlus_ReDraw($hWnd)
    ;----- Allows redraw of the GDI+ Image upon window min/maximize -----
    _WinAPI_RedrawWindow($hWnd,0,0,0x0100)
    _GraphGDIPlus_Refresh($aGraphGDIPlusaGraphArrayINTERNAL)
EndFunc