怎么实现让控件透明

Question

在基于对话框的程序里面怎么实现让控件透明
能提供代码或者例子就更好

Answer 1

定义常量:
#define WS_EX_LAYERED           0x00080000
#define LWA_ALPHA               0x00000002
声明函数:
extern "C" {
WINUSERAPI BOOL WINAPI
SetLayeredWindowAttributes(
    HWND hwnd,
    COLORREF crKey,
    BYTE bAlpha,
    DWORD dwFlags);
}
头文件: <winuser.h>
产生透明窗口:
不要忘了给窗口的ExStyle加入WS_EX_LAYERED属性
SetWindowLong(GetSafeHwnd(),
  GWL_EXSTYLE,
  GetWindowLong(GetSafeHwnd(),GWL_EXSTYLE)^WS_EX_LAYERED);
SetLayeredWindowAttributes(GetSafeHwnd(),RGB(0,0,0),150,LWA_ALPHA);

Answer 2

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
/*******&Ograve;&Ocirc;&Iuml;&Acirc;&Otilde;&acirc;&frac14;&cedil;&ETH;&ETH;&acute;ú&Acirc;&euml;&Auml;&Uuml;&sup1;&raquo;&Ecirc;&sup1;&para;&Ocirc;&raquo;°&iquest;ò&Iuml;&Ocirc;&Ecirc;&frac34;&Iacute;&cedil;&Atilde;÷*******/
//&frac14;&Oacute;&Egrave;&euml;WS_EX_LAYERED&Agrave;&copy;&Otilde;&sup1;&Ecirc;&ocirc;&ETH;&Ocirc;
SetWindowLong(this->GetSafeHwnd(),GWL_EXSTYLE,
GetWindowLong(this->GetSafeHwnd(),GWL_EXSTYLE)^0x80000);
HINSTANCE hInst = LoadLibrary("User32.DLL"); 
if(hInst) 
{ 
typedef BOOL (WINAPI *MYFUNC)(HWND,COLORREF,BYTE,DWORD); 
MYFUNC fun = NULL;
//&Egrave;&iexcl;&micro;&Atilde;SetLayeredWindowAttributes&ordm;&macr;&Ecirc;&yacute;&Ouml;&cedil;&Otilde;&euml; 
fun=(MYFUNC)GetProcAddress(hInst, "SetLayeredWindowAttributes");
if(fun)fun(this->GetSafeHwnd(),0,128,2); 
FreeLibrary(hInst); 
}
/*******&Ograve;&Ocirc;&Eacute;&Iuml;&Otilde;&acirc;&frac14;&cedil;&ETH;&ETH;&acute;ú&Acirc;&euml;&Auml;&Uuml;&sup1;&raquo;&Ecirc;&sup1;&para;&Ocirc;&raquo;°&iquest;ò&Iuml;&Ocirc;&Ecirc;&frac34;&Iacute;&cedil;&Atilde;÷*******/

CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}

Answer 3

TO:wistaria(听风听雨)
请问SetLayeredWindowAttributes是怎么实现的啊

Answer 4

有没有具体一点的例子啊,我的EMIAL:[email protected]

Answer 5

SetLayeredWindowAttributes只在2000下可用,最好使用动态装载的形式调用,否则程序在98下根本启动不得.

Answer 6

BCB_FANS(四大名捕之追杀令)
说的有道理