关于透明窗口的一些收集

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首先，用生成向导建立个基于对话框的程序框架，取名为PartTransparent

第二，重写BOOL CPartTransparentDlg::OnInitDialog()，也就是重写,对话框类的OnInitDialog()这个函数，在里面，return TRUE;前面加入下面的代码：

SetWindowLong(this->GetSafeHwnd(),GWL_EXSTYLE,GetWindowLong(this->GetSafeHwnd(),GWL_EXSTYLE)^0x80000);HINSTANCE hInst = LoadLibrary(L"User32.DLL");if (hInst){typedef BOOL (WINAPI * MYFUNC)(HWND,COLORREF,BYTE,DWORD);MYFUNC fun = NULL;fun = (MYFUNC)GetProcAddress(hInst,"SetLayeredWindowAttributes");if (fun)fun(this->GetSafeHwnd(),0,128,2);FreeLibrary(hInst);}

其中fun(this->GetSafeHwnd(),0,128,2);修改窗口的透明度，值越接近255越不透明。

方法二：

BOOL   CALLBACK   EnumChildFunc(HWND   hwnd,   LPARAM   lParam) { CRgn   *pRgn   =   (CRgn*)lParam; CRect   rcChild; ::GetWindowRect(hwnd,   rcChild); CRgn   rgnChild; CRgn   rgnCopy; rgnCopy.CreateRectRgn(0,   0,   1,   1); rgnCopy.CopyRgn(pRgn); rgnChild.CreateRectRgn(rcChild.left,   rcChild.top,   rcChild.right,   rcChild.bottom); pRgn-> CombineRgn(&rgnCopy,   &rgnChild,   RGN_OR); return   TRUE; } int   SetBackTransparent(CWnd   *pWnd,   BOOL   bClientOnly   =   TRUE) { CRgn   rgn; if(bClientOnly) { CRgn   rgnWindow,   rgnClient; CRect   rcWindow,   rcClient,   rcRgn; pWnd-> GetWindowRect(rcWindow); pWnd-> GetClientRect(rcClient); pWnd-> ClientToScreen(rcClient); rgnWindow.CreateRectRgn(rcWindow.left,   rcWindow.top,   rcWindow.right,   rcWindow.bottom); rgnClient.CreateRectRgn(rcClient.left,   rcClient.top,   rcClient.right,   rcClient.bottom); rgn.CreateRectRgn(0,   0,   1,   1); rgn.CombineRgn(&rgnWindow,   &rgnClient,   RGN_DIFF); } else { rgn.CreateRectRgn(0,   0,   0,   0); } ::EnumChildWindows(pWnd-> GetSafeHwnd(),   (WNDENUMPROC)EnumChildFunc,(LPARAM)&rgn); return   pWnd-> SetWindowRgn(rgn,   TRUE); }

   调用办法：
   在CYourDialog::OnInitDialog里加上
   SetBackTransparent(this);
   如果要连非客户区都透明，用
   SetBackTransparent(this, FALSE);