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VB App that tries to use Sendkey to login to a Citrix client

cbrown-aps
cbrown-aps asked
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Last Modified: 2012-06-22
I am trying to launch a Citrix client and send keystrokes to log in automatically from a VB app. The problem is until my app hits a breakpoint or finishes executing the Citrix client will not finish loading and display the login screen. I can insert a breakpoint and the login screen will display. Then I let my app run and it will login to the client just like I want it to. I need my app to give up control so that the login can finish loading. Then it needs to start up and send the keystrokes.

Here is the code as a console app. I've tried it without the threading and also in a windows app.

Imports system.Diagnostics
Imports System.ComponentModel
Imports System.Threading
Module Module1
    Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindow As String) As Integer
    Public Declare Function ShowWindow Lib "user32" Alias "ShowWindowA" (ByVal hwnd As Integer, ByVal nCmdShow As Integer) As Integer
    Public Declare Function SetForegroundWindow Lib "user32" Alias "SetForegroundWindow" (ByVal hwnd As Integer) As Integer
    Sub Main()
        Dim StartTime As Date = DateTime.Now
        Dim CitrixStartThread As New Thread(AddressOf CitrixStart)
        Dim CitrixLoginThread As New Thread(AddressOf CitrixLogin)

        CitrixStartThread.Name = "CitrixStartThread"
        CitrixStartThread.Start()

        Do
            If StartTime.AddSeconds(25) <= DateTime.Now Then
                Exit Do
            End If
            'Application.DoEvents()
        Loop

        CitrixLoginThread.Name = "CitrixLoginThread"
        CitrixLoginThread.Start()
    End Sub

    Private Sub CitrixStart()
        Dim proc As New Process
        proc.StartInfo.FileName = "net6vpn.exe"
        proc.StartInfo.WorkingDirectory = "c:\program files\net6"
        proc.Start()
        proc.
    End Sub

    Private Sub CitrixLogin()
        Dim hWnd As Integer = FindWindow(Nothing, "Citrix Secure Access")
        If hWnd <= 0 Then
            'MessageBox.Show("Application Not Found", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
            Exit Sub
        End If
        Dim i As Integer = 1
        For i = 1 To 10
            SetForegroundWindow(hWnd)
            My.Computer.Keyboard.SendKeys("$mcdermott$~", True)
        Next
    End Sub
End Module
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Commented:
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Proc.WaitForInputIdle  

Is suppose to work, but I haven't had much luck with it.

I think it only works once the application is started, and you have a window handle to it.

Commented:
Hello,
Were you able to sendkey strokes to citrix app from a VB app without much headaches?

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