MFC制作不规则窗体

为什么用别人的方法不行啊！！！

不管了，反正我也能实现。思路还是不是很清晰。

1.制作png图片。注意边界，多试几次会明白我的意思的

2.m_image为CImage类，在OnInitDialog()里加上：

	ModifyStyleEx(0,WS_EX_LAYERED);
	m_image.Load(_T("res\\test1.png"));
	DrawUI();

DrawUI()实现如下：

void CdirectUITest2Dlg::DrawUI()
{
	HDC hDC=::GetDC(m_hWnd);
	HDC hMemDC=::CreateCompatibleDC(hDC);

	BITMAPINFO bitmapinfo;
	bitmapinfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	bitmapinfo.bmiHeader.biBitCount = 32;
	bitmapinfo.bmiHeader.biHeight =500;
	bitmapinfo.bmiHeader.biWidth = 500;
	bitmapinfo.bmiHeader.biPlanes = 1;
	bitmapinfo.bmiHeader.biCompression=BI_RGB;
	bitmapinfo.bmiHeader.biXPelsPerMeter=0;
	bitmapinfo.bmiHeader.biYPelsPerMeter=0;
	bitmapinfo.bmiHeader.biClrUsed=0;
	bitmapinfo.bmiHeader.biClrImportant=0;
	bitmapinfo.bmiHeader.biSizeImage = bitmapinfo.bmiHeader.biWidth * bitmapinfo.bmiHeader.biHeight * bitmapinfo.bmiHeader.biBitCount / 8;
	HBITMAP hBitmap=::CreateDIBSection (hMemDC,&bitmapinfo, 0,NULL, 0, 0);
	HBITMAP hOldBitmap = (HBITMAP)::SelectObject (hMemDC,hBitmap);

	//画出各个界面元素----------------------
	m_image.Draw( hMemDC,0,0 );

	//设置透明窗口-------------------------------------------------
	CPoint DestPt(0,0);
	CSize psize(500,500);
	BLENDFUNCTION blendFunc32bpp;
	blendFunc32bpp.AlphaFormat = AC_SRC_ALPHA;
	blendFunc32bpp.BlendFlags = 0;
	blendFunc32bpp.BlendOp = AC_SRC_OVER;
	blendFunc32bpp.SourceConstantAlpha = 255;
	::UpdateLayeredWindow(m_hWnd,hDC,NULL,&psize,hMemDC,&DestPt,0,&blendFunc32bpp,ULW_ALPHA);

	//释放资源-------------------------------------------------
	::SelectObject (hMemDC,hOldBitmap);
	::DeleteObject(hBitmap);
	::DeleteDC(hMemDC);
	::ReleaseDC(m_hWnd,hDC);
}

3.加上鼠标拖动

void CdirectUITest2Dlg::OnLButtonDown(UINT nFlags, CPoint point)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	ReleaseCapture ();
	SendMessage (WM_NCLBUTTONDOWN, HTCAPTION, 0);
	CDialogEx::OnLButtonDown(nFlags, point);
}