WaitForSingleObject Fails

[AmitM9S6]

Hello,
I have the following code :

SHELLEXECUTEINFO ExecuteInfo;

	memset(&ExecuteInfo, 0, sizeof(ExecuteInfo)); // Reseting ExecuteInfo
    
    ExecuteInfo.cbSize       = sizeof(ExecuteInfo); // Size
    ExecuteInfo.fMask        = NULL;                
    ExecuteInfo.hwnd         = NULL;                
    ExecuteInfo.lpVerb       = "open";                      // Operation to perform
    ExecuteInfo.lpFile       = "D:\\ffmpeg";  // Application name
    ExecuteInfo.lpParameters = ConvertCall.c_str();          // Additional parameters
    ExecuteInfo.lpDirectory  = NULL;                           // Default directory
    ExecuteInfo.nShow        = SW_HIDE; // Hide the ShellExecute
    ExecuteInfo.hInstApp     = 0;

	ShellExecuteEx(&ExecuteInfo);
	DWORD s = WaitForSingleObject(ExecuteInfo.hProcess,INFINITE);

My problem is, WaitForSingleObject allways fails... (s is getting the value of 4294967295 which means it failed)

I have called GetLastError, and I am getting the error of : "Handle is invalid" Why so ?

Why does it allways fail ? I need the program to wait untill ShellExecuteEx finishes completely.

Thanks!

[Chervil]

I don't know for sure. When I used similar code I had

    ShExecInfo.fMask        = SEE_MASK_NOCLOSEPROCESS;

and

    ShExecInfo.lpVerb       = NULL;

and most of the rest was pretty similar to what you have.

[AmitM9S6]

Thank you!!

I have done some testings, and figured the line

ShExecInfo.fMask        = SEE_MASK_NOCLOSEPROCESS;

have caused me the problems, and once I used SEE_MASK_NOCLOSEPROCESS, everything went great!