import gdi;
namespace win.region;

/*intellisense(::)*/ 
::SetWindowRgn := ::User32.api("SetWindowRgn", "bool(addr hWnd, pointer hRgn, bool bRedraw)");
::CreateRoundRectRgn := ::Gdi32.api( "CreateRoundRectRgn", "pointer(int, int, int, int, int, int)" );
::CreateRectRgn := ::Gdi32.api("CreateRectRgn", "pinter(int top,int top,int right,int bottom)");
::GetWindowRgn := ::User32.api("GetWindowRgn", "int(addr hWnd, pointer hRgn)");
::CombineRgn := ::Gdi32.api("CombineRgn", "int(pointer hrg,pointer hrgnSrc1,pointer hrgnSrc12,int mode)");
/*end intellisense*/

getWindowRgn = function(hwnd){
	var hrgn = CreateRectRgn(0,0,0,0)
	if( hrgn ){
		var r = GetWindowRgn(hwnd,hrgn);
		if( r = 0x3/*_COMPLEXREGION*/ || r = 0x2/*_SIMPLEREGION*/ ){
			return hrgn;
		}
	}
}

copy = function(hRgnSrc){
	var hRgnNew = ::CreateRectRgn(0,0,0,0);
    ::CombineRgn(hRgnNew,hRgnSrc,null,5/*_RGN_COPY*/);	
    return hRgnNew;
}

/**intellisense(win)
region = 该支持库定义REGION相关API
region.getWindowRgn(__/*HWND窗口句柄*/) = 复制窗体绘图区域
region.copy(__/*HRGN绘图区域句柄*/) = 复制HRGN句柄
end intellisense**/