使用注册COM 组件 方法

                                         使用注册COM 组件  方法

 

     1.首先导入DLL

         #import "MMGifCtrl.dll"   no_namespace

      2.确保DLL已经被注册，注册DLL的代码如下：

           

//这里注册dll, 这行语句会弹DOS窗口，下面的代码不会
SHELLEXECUTEINFO ShExecInfo = {0};
ShExecInfo.cbSize	= sizeof(SHELLEXECUTEINFO);
ShExecInfo.fMask	= SEE_MASK_NOCLOSEPROCESS;
ShExecInfo.hwnd		= NULL;
ShExecInfo.lpVerb	= TEXT("open");
ShExecInfo.lpFile	= TEXT("regsvr32.exe");

CString strParam = TEXT("/"") + theApp.strRootDirectory + TEXT("//MMGifCtrl.dll/" /s");

ShExecInfo.lpParameters = strParam;
wchar_t szBuf[MAX_PATH];
GetSystemDirectoryW(szBuf, MAX_PATH);
ShExecInfo.lpDirectory	= szBuf;
ShExecInfo.nShow	= SW_HIDE;
ShExecInfo.hInstApp = NULL;
ShellExecuteEx(&ShExecInfo);
// 指定时间没结束
if (WaitForSingleObject(ShExecInfo.hProcess, 5000) == WAIT_TIMEOUT)
{
// 强行杀死进程
TerminateProcess(ShExecInfo.hProcess, 0);
_com_issue_error(hr);
}

       3.  获得COM的接口

          

IMMGifCtrl *    pShowGif     = NULL;
HRESULT         hr;

hr = ::CoCreateInstance(__uuidof(CMMGifCtrl), NULL, CLSCTX_INPROC, __uuidof(IMMGifCtrl), (LPVOID*)&pShowGif);

if(FAILED(hr))
{
//说明COM没有被注册，在此用代码注册 COM

}

      4.  获得了  IMMGifCtrl接口，就可以干活啦！