internal static extern Int32 WaitForSingleObject(IntPtr handle, Int32 milliseconds);

        int rc = WaitForSingleObject( _Handle, TimeoutInSecs * 1000 );

This is great for starting an external app and then using the PID and handle for calls to functions such as WaitForSingleObject and all window message functions.

public static extern Int32 WaitForSingleObject(IntPtr handle, int milliseconds);

     int ret = Win32.PowerManagement.WaitForSingleObject(handle, (int)Win32.PowerManagement.INFINITE);

    static extern Int32 WaitForSingleObject(IntPtr Handle, uint Wait);

        if (WaitForSingleObject(handle, INFINITE) != 0)

        static extern Int32 WaitForSingleObject(IntPtr Handle, uint Wait);

            if (WaitForSingleObject(handle, INFINITE) != 0)

  static extern UInt32 WaitForSingleObject(IntPtr hHandle, UInt32 dwMilliseconds);

  Function WaitForSingleObject( _

static def WaitForSingleObject(hHandle as IntPtr, dwMilliseconds as uint) as uint:

  WaitForSingleObject(handle, (int)INFINITE);

  WaitForSingleObject(handle, INFINITE)

     if(WaitForSingleObject(ReceivedEvent,INFINITE) == WAIT_OBJECT_0)

waitFor = WaitForSingleObject(hMutex, 10000);

    Public Shared Function WaitForSingleObject(ByVal handle As IntPtr, ByVal milliseconds As Integer) As Integer

        Dim val As Integer = WaitHandles.WaitForSingleObject(Me._handle, millisecondsTimeout)

You will need the above ProcessInfo class and may also want to use GetLastError and WaitForSingleObject.

    WaitForSingleObject(pi.hProcess, INFINITE);

public static extern Int32 WaitForSingleObject(IntPtr Handle,Int32 Wait);

Public Function WaitForSingleObject(ByVal handle As IntPtr, ByVal milliseconds As Integer) As Integer

waitResult = WaitForSingleObject(pi.hProcess,INFINITE);

result = WaitForSingleObject(pi.hProcess, INFINITE)

    Public Function WaitForSingleObject(ByVal handle As IntPtr, ByVal milliseconds As UInt32) As UInt32

    WaitForSingleObject(processInfo.process, Infinite)

        public static extern UInt32 WaitForSingleObject(IntPtr handle, UInt32 milliseconds);

            WaitForSingleObject(processInfo.process, Infinite);