We all know that Microsoft .NET, C # is the first language used to develop network solutions. However, in the fat client, C # also has excellent performance. For those programmers who are familiar with Win32 API, how is the key to the new characteristics of C # with the Win32 API.
The following example shows how to call WIN32 API in C #, all windows:
1. First, you need to declare a delegate function for Win32 API - EnumWindows callback function:
Public Delegate Bool Callback (int hwnd, int lparam);
2. Then use the platform in the C # to call the declaration from the USER32.DLL library, please refer to the MSDN - Win32 API for the specific parameters.
[DLLIMPORT ("User32")]]
Public Static Extern Int EnumWindows (Callback X, INT Y);
3. Finally, instantiate the entrustment, calling EnumWindows.
Callback mycallback = new callback (enumwindowsapp.report);
4. The full code is as follows:
Using system;
Using system.Runtime.InteropServices;
Public Delegate Bool Callback (int hwnd, int lparam);
Public Class EnumWindowsApp
{
[DLLIMPORT ("User32")]]
Public Static Extern Int EnumWindows (Callback X, INT Y);
Public static void main ()
{
Callback mycallback = new callback (enumwindowsapp.report);
ENUMWINDOWS (MyCallback, 0);
}
Public Static Bool Report (int hwnd, int lparam)
{
Console.write ("Window Handle IS:");
Console.WriteLine (hwnd);
Return True;
}
}
Note: Please refer to Visual .NET HELP for details on "Principal", "Platform Call" and "Instantiation".
