C / C++ / MFC

 STARTUPINFO si;
    PROCESS_INFORMATION pi;

    ZeroMemory( &si, sizeof(si) );
    si.cb = sizeof(si);
	
    ZeroMemory( &pi, sizeof(pi) );
	

	if( CreateProcess(NULL,   // No module name (use command line)
       "C:\\Windows\\MsHta.exe SetupGUI.hta"    // Command line
,
        NULL,           // Process handle not inheritable
        NULL,           // Thread handle not inheritable
        FALSE,          // Set handle inheritance to FALSE
        0,              // No creation flags
        NULL,           // Use parent's environment block
        NULL,           // Use parent's starting directory 
        &si,            // Pointer to STARTUPINFO structure
        &pi            // Pointer to PROCESS_INFORMATION structure
		))
	{

	// Wait until child process exits.
    WaitForSingleObject(pi.hProcess, INFINITE );

    // Close process and thread handles. 
    CloseHandle( pi.hProcess );
    CloseHandle( pi.hThread );