Sets the window region of a window
#include <WinAPIGdi.au3>
_WinAPI_SetWindowRgn ( $hWnd, $hRgn [, $bRedraw = True] )
| $hWnd | Handle to the window whose window region is to be set. |
| $hRgn | Handle to a region. The function sets the window region of the window to this region. |
| $bRedraw | [optional] Specifies whether the system redraws the window after setting the window region. |
| Success: | True |
| Failure: | False |
The window region determines the area within the window where the system permits drawing.
The system does not display any portion of a window that lies outside of the window region
When this function is called, the system sends the WM_WINDOWPOSCHANGING and WM_WINDOWPOSCHANGED messages to the window.
The coordinates of a window's window region are relative to the upper-left corner of the window, not the client area of the window.
After a successful call to SetWindowRgn, the system owns the region specified by the region handle $hRgn.
The system does not make a copy of the region. Thus, you should not make any further function calls with this region handle.
In particular, do not delete this region handle. The system deletes the region handle when it no longer needed.
_WinAPI_CombineRgn, _WinAPI_CreateRectRgn, _WinAPI_CreateRoundRectRgn, _WinAPI_GetWindowRgn
Search SetWindowRgn in MSDN Library.
#include <GUIConstantsEx.au3>
#include <WinAPIGdi.au3>
#include <WinAPIHObj.au3>
#include <WinAPISys.au3>
#include <WindowsConstants.au3>
; get height of window title and width of window frame - may be different when XP theme is ON/OFF
Global $g_iHtit = _WinAPI_GetSystemMetrics($SM_CYCAPTION)
Global $g_iFrame = _WinAPI_GetSystemMetrics($SM_CXDLGFRAME)
Global $g_hGui = GUICreate("Test Windows regions", 350, 210)
Local $id_Default = GUICtrlCreateButton("Default region", 100, 30, 150)
Local $id_Round = GUICtrlCreateButton("Round region", 100, 60, 150)
Local $id_Buble = GUICtrlCreateButton("Buble region ", 100, 90, 150)
Local $id_Transparent = GUICtrlCreateButton("Transparent region", 100, 120, 150)
Local $id_Exit = GUICtrlCreateButton("Exit", 100, 150, 150)
GUISetState(@SW_SHOW)
Local $aPos = WinGetPos($g_hGui) ; get whole window size (no client size defined in GUICreate)
Global $g_iWidth = $aPos[2]
Global $g_iHeight = $aPos[3]
Local $iMsg, $hRgn
While 1
$iMsg = GUIGetMsg()
Select
Case $iMsg = $GUI_EVENT_CLOSE Or $iMsg = $id_Exit
ExitLoop
Case $iMsg = $id_Default
$hRgn = _WinAPI_CreateRectRgn(0, 0, $g_iWidth, $g_iHeight)
_WinAPI_SetWindowRgn($g_hGui, $hRgn)
Case $iMsg = $id_Round
$hRgn = _WinAPI_CreateRoundRectRgn(0, 0, $g_iWidth, $g_iHeight, $g_iWidth / 3, $g_iHeight / 3)
_WinAPI_SetWindowRgn($g_hGui, $hRgn)
Case $iMsg = $id_Buble
Local $hRgn1 = _WinAPI_CreateRoundRectRgn(0, 0, $g_iWidth / 2, $g_iHeight / 2, $g_iWidth / 2, $g_iHeight / 2) ; left-top
Local $hRgn2 = _WinAPI_CreateRoundRectRgn($g_iWidth / 2, 0, $g_iWidth, $g_iHeight / 2, $g_iWidth / 2, $g_iHeight / 2) ; right-top
_WinAPI_CombineRgn($hRgn1, $hRgn1, $hRgn2, $RGN_OR)
_WinAPI_DeleteObject($hRgn2)
$hRgn2 = _WinAPI_CreateRoundRectRgn(0, $g_iHeight / 2, $g_iWidth / 2, $g_iHeight, $g_iWidth / 2, $g_iHeight / 2) ; left-bottom
_WinAPI_CombineRgn($hRgn1, $hRgn1, $hRgn2, $RGN_OR)
_WinAPI_DeleteObject($hRgn2)
$hRgn2 = _WinAPI_CreateRoundRectRgn($g_iWidth / 2, $g_iHeight / 2, $g_iWidth, $g_iHeight, $g_iWidth / 2, $g_iHeight / 2) ; right-bottom
_WinAPI_CombineRgn($hRgn1, $hRgn1, $hRgn2, $RGN_OR)
_WinAPI_DeleteObject($hRgn2)
$hRgn2 = _WinAPI_CreateRoundRectRgn(10, 10, $g_iWidth - 10, $g_iHeight - 10, $g_iWidth, $g_iHeight) ; middle
_WinAPI_CombineRgn($hRgn1, $hRgn1, $hRgn2, $RGN_OR)
_WinAPI_DeleteObject($hRgn2)
_WinAPI_SetWindowRgn($g_hGui, $hRgn1)
Case $iMsg = $id_Transparent
_GuiHole($g_hGui, 40, 40, 260, 170)
EndSelect
WEnd
; make inner transparent area but add controls
Func _GuiHole($hWin, $iX, $iY, $iSizeW, $iSizeH)
Local $hOuter_rgn, $hInner_rgn, $hCombined_rgn
$hOuter_rgn = _WinAPI_CreateRectRgn(0, 0, $g_iWidth, $g_iHeight)
$hInner_rgn = _WinAPI_CreateRectRgn($iX, $iY, $iX + $iSizeW, $iY + $iSizeH)
$hCombined_rgn = _WinAPI_CreateRectRgn(0, 0, 0, 0)
_WinAPI_CombineRgn($hCombined_rgn, $hOuter_rgn, $hInner_rgn, $RGN_DIFF)
_WinAPI_DeleteObject($hOuter_rgn)
_WinAPI_DeleteObject($hInner_rgn)
_AddCtrlRegion($hCombined_rgn, $id_Default)
_AddCtrlRegion($hCombined_rgn, $id_Round)
_AddCtrlRegion($hCombined_rgn, $id_Buble)
_AddCtrlRegion($hCombined_rgn, $id_Transparent)
_AddCtrlRegion($hCombined_rgn, $id_Exit)
_WinAPI_SetWindowRgn($hWin, $hCombined_rgn)
EndFunc ;==>_GuiHole
; add control's area to given region
; respecting also window title/frame sizes
Func _AddCtrlRegion($hFull_rgn, $idCtrl)
Local $aCtrl_pos, $hCtrl_rgn
$aCtrl_pos = ControlGetPos($g_hGui, "", $idCtrl)
$hCtrl_rgn = _WinAPI_CreateRectRgn($aCtrl_pos[0] + $g_iFrame, $aCtrl_pos[1] + $g_iHtit + $g_iFrame, _
$aCtrl_pos[0] + $aCtrl_pos[2] + $g_iFrame, $aCtrl_pos[1] + $aCtrl_pos[3] + $g_iHtit + $g_iFrame)
_WinAPI_CombineRgn($hFull_rgn, $hFull_rgn, $hCtrl_rgn, $RGN_OR)
_WinAPI_DeleteObject($hCtrl_rgn)
EndFunc ;==>_AddCtrlRegion