Selects a region as the current clipping region for the specified device context
#include <WinAPIGdi.au3>
_WinAPI_SelectClipRgn ( $hDC, $hRgn )
| $hDC | Handle to the device context. |
| $hRgn | Handle to the region to be selected. To remove a device-context's clipping region, set this parameter to 0. |
| Success: | The value that specifies the new clipping region's complexity; it can be one of the following values. $COMPLEXREGION $NULLREGION $SIMPLEREGION |
| Failure: | 0. |
Only a copy of the selected region is used. The region itself can be selected for any number of other device
contexts or it can be deleted.
Search SelectClipRgn in MSDN Library.
#include <GUIConstantsEx.au3>
#include <SendMessage.au3>
#include <StaticConstants.au3>
#include <WinAPIGdi.au3>
#include <WinAPIGdiDC.au3>
#include <WinAPIHObj.au3>
#include <WinAPIMisc.au3>
#include <WinAPISysWin.au3>
#include <WindowsConstants.au3>
; Create GUI
Local $hForm = GUICreate('Test ' & StringReplace(@ScriptName, '.au3', '()'), 281, 281)
Local $idPic = GUICtrlCreatePic('', 0, 0, 281, 281)
Local $hPic = GUICtrlGetHandle($idPic)
; Create bitmap
Local $hDC = _WinAPI_GetDC($hPic)
Local $hMemDC = _WinAPI_CreateCompatibleDC($hDC)
Local $hBitmap = _WinAPI_CreateCompatibleBitmapEx($hDC, 281, 281, _WinAPI_SwitchColor(_WinAPI_GetSysColor($COLOR_3DFACE)))
Local $hMemSv = _WinAPI_SelectObject($hMemDC, $hBitmap)
Local $hRgn = _WinAPI_CreateEllipticRgn(_WinAPI_CreateRectEx(40, 40, 201, 201))
_WinAPI_SelectClipRgn($hMemDC, $hRgn)
Local $aVertex[3][3] = [[140, -50, 0xFFFF00], [-50, 244, 0x00F0FF], [331, 244, 0xFF00FF]]
_WinAPI_GradientFill($hMemDC, $aVertex)
_WinAPI_DeleteObject($hRgn)
_WinAPI_ReleaseDC($hPic, $hDC)
_WinAPI_SelectObject($hMemDC, $hMemSv)
_WinAPI_DeleteDC($hMemDC)
; Set bitmap to control
_SendMessage($hPic, $STM_SETIMAGE, 0, $hBitmap)
Local $hObj = _SendMessage($hPic, $STM_GETIMAGE)
If $hObj <> $hBitmap Then
_WinAPI_DeleteObject($hBitmap)
EndIf
GUISetState(@SW_SHOW)
Do
Until GUIGetMsg() = $GUI_EVENT_CLOSE