nbourg8
How do I cheat?
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Joined: 12 Dec 2007
Posts: 7
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 Posted: Thu Dec 27, 2007 4:41 pm Post subject: Cross-Threading Operation Invalid |
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I would like to setup a C# program that sets up 3 hotkeys(U,I,O). When U is pressed, it enters a loop which can be paused by I, and application by O. Thus, when U is pressed, the textbox begins changing text and when I is pressed, it pauses. My problem is obvious when you try to debug this code.
Here is my feeble attempt:
| Code: |
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Threading;
namespace WindowsApplication1
{
public partial class Form1 : System.Windows.Forms.Form
{
static Thread mainThread;
static Thread firstThread;
static Thread secondThread;
private const int MYKEYID = 0; //Ctrl+Shift+U start
private const int MYKEYID1 = 1; //Ctrl+Shift+I pause
private const int MYKEYID2 = 2; //Ctrl+Shift+O disable threads
private int stopcode = 0;
private const bool unl = true;
public Form1()
{
mainThread = Thread.CurrentThread;
firstThread = new Thread(new ThreadStart(Fun1));
secondThread = new Thread(new ThreadStart(Fun2));
firstThread.Start();
secondThread.Start();
InitializeComponent();
RegisterHotKey(this.Handle, MYKEYID, MOD_CONTROL + MOD_SHIFT, Keys.U);
RegisterHotKey(this.Handle, MYKEYID1, MOD_CONTROL + MOD_SHIFT, Keys.I);
RegisterHotKey(this.Handle, MYKEYID2, MOD_CONTROL + MOD_SHIFT, Keys.O);
this.FormClosing += this.Form1_FormClosing;
}
public void Fun1()
{
int x = 0;
while (unl)
{
if (stopcode == 1)
{
SendKeys.SendWait(". ");
Thread.Sleep(1000);
textBox1.Text = x.ToString();
x++;
}
}
}
public void Fun2()
{
while (unl)
{
if (stopcode == 0)
{
Thread.Sleep(10);
}
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
UnregisterHotKey(this.Handle, MYKEYID);
UnregisterHotKey(this.Handle, MYKEYID1);
UnregisterHotKey(this.Handle, MYKEYID2);
if (firstThread.IsAlive)
firstThread.Abort();
if (secondThread.IsAlive)
secondThread.Abort();
}
protected override void WndProc(ref Message m)
{
int hotkeyID = (int)m.WParam;
base.WndProc(ref m);
if (m.Msg == WM_HOTKEY)
switch (hotkeyID)
{
case 0:
stopcode = 1;
break;
case 1:
stopcode = 0;
break;
case 2:
Application.Exit();
break;
}
}
// P/Invoke declarations
private const int WM_HOTKEY = 0x312;
private const int MOD_ALT = 1;
private const int MOD_CONTROL = 2;
private const int MOD_SHIFT = 4;
[DllImport("user32.dll")]
private static extern int RegisterHotKey(IntPtr hWnd, int id, int modifier, Keys vk);
[DllImport("user32.dll")]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
private void Form1_Load(object sender, EventArgs e)
{
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
}
} |
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