在VC下创建不规则窗口非常简单,无非就是创建一个HRGN,然后再调用SetWindowRgn就行了,如我们要创建一个原形的窗口只需要如下代码:
CRgn rgn;
rgn.CreateEllipticRgn( 100,100, 200, 200 );
SetWindowRgn((HRGN)rgn, TRUE);
本文中的例子为一个透明位图不规则窗口,其主要函数如下:
void CExampleDlg::SetupRegion(CDC *pDC)
{
CDC memDC;
CBitmap &cBitmap=m_bmpDraw;
CBitmap* pOldMemBmp = NULL;
COLORREF col,colMask;
CRect cRect;
int x, y;
CRgn wndRgn, rgnTemp;
GetWindowRect(&cRect);
CPoint ptOrg=cRect.TopLeft();
BITMAP bmInfo;
cBitmap.GetObject(sizeof(bmInfo),&bmInfo);
CRect rcNewWnd=CRect(ptOrg,CSize(bmInfo.bmWidth,bmInfo.bmHeight));
memDC.CreateCompatibleDC(pDC);
pOldMemBmp = memDC.SelectObject(&cBitmap);
colMask=memDC.GetPixel(0,0);
wndRgn.CreateRectRgn(0, 0, rcNewWnd.Width(), rcNewWnd.Height());
for(x=0; x<=rcNewWnd.Width(); x++)
{
for(y=0; y<=rcNewWnd.Height(); y++)
{
col = memDC.GetPixel(x, y);
if(col == colMask)
{
rgnTemp.CreateRectRgn(x, y, x+1, y+1);
wndRgn.CombineRgn(&wndRgn, &rgnTemp, RGN_XOR);
rgnTemp.DeleteObject();
}
}
}
memDC.SelectObject(pOldMemBmp);
SetWindowRgn((HRGN)wndRgn, TRUE);
}
转载于:https://www.cnblogs.com/rogee/archive/2011/02/15/1954987.html