C#

• Interoperating with Unmanaged Code[^]
• System.Runtime.InteropServices namespace[^]
• DllImportAttribute class[^]

/***********************************************************************
*                                                                      *
*       psmsgapi.h -- Deliverable Header File for Message Agent API    *
*                                                                      *
************************************************************************
*                                                                      *
*               Confidentiality Information:                           *
*                                                                      *
* This module is the confidential and proprietary information of       *
* PeopleSoft, Inc.; it is not to be copied, reproduced, or transmitted *
* in any form, by any means, in whole or in part, nor is it to be used *
* for any purpose other than that for which it is expressly provided   *
* without the written permission of PeopleSoft.                        *
*                                                                      *
* Copyright (c) 1988-2000 PeopleSoft, Inc.  All Rights Reserved.       *
*                                                                      *
************************************************************************
*                                                                      *
* SourceSafe Information:                                              *
*                                                                      *
* $Header:: /PT75/SRC/INC/PSMSGAPI.H 47    2/05/01 10:37p Ltedjak $*
*                                                                      *
***********************************************************************/

"You can have everything in life you want if you will just help enough other people get what they want." --Zig Ziglar

The Second EuroCPian Event will be in Brussels on the 4th of September

Can't manage to P/Invoke that Win32 API in .NET? Why not do interop the wiki way!

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public class MyControl : UserControl
{
  static readonly IntPtr WM_LBUTTONDOWN = new IntPtr(0x0201);
  const int WM_PARENTNOTIFY = 0x0210;
  // ...
  protected override void WndProc(ref Message m)
  {
    if (m.Msg == WM_PARENTNOFITY)
    {
      if (m.WParam == WM_LBUTTONDOWN)
      {
        // ...
      }
    }
    base.WndProc(ref m);
  }
}

for (int i=0; i < 5; i++)
{
  MenuItem menu = new MenuItem("Menu " + i.ToString());
  menu.Click += new EventHandler(MenuItem_Click);
  contextMenu1.MenuItems.Add(menu);
}
// ...
private void MenuItem_Click(object sender, EventArgs e)
{
  MenuItem menu = sender as MenuItem;
  if (menu != null) MessageBox.Show(menu.Text + " was clicked.");
}

// in the Form class, MyForm.cs
OtherClass theOtherClass = new OtherClass(this);

// in the other class
public class OtherClass
{
   MyForm myFormInstance = null;
   
   public OtherClass(MyForm frmInst)
   {
      this.myFormInstance = frmInst;

      this.myFormInstance.DoSomething();
   }
}

public class MyForm : Form
{
   public static MyForm TheFormInstance = null;

   public MyForm()
   {
      TheFormInstance = this;
   }
}

// in some other class (note that MyForm is the actual name of the class, not a class instance)
MyForm.TheFormInstance.DoSomething();