Sample Code 
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An example for using RegisterHotKey and Keybd_event...
And a nice utility to help you use cheats on games!. 
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I'm working on a real keylogger, and I was researching how to do them, and after a bit of thinking I came up with this code... .
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Sample code on how to detect if a column header is being clicked, and respond to that action..
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How to count the number of lines in a multi-line textbox.
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How to simulate keyboard events.
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How to create a mouse out event.
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This simple code shows you how to disable/enable the Ctrl+Alt+Del keys.
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Create a screen that prevents users from using the PC, until they enter a valid password.
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How to add your applications icon to the system tray.
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Shows you how to add another item to an application's system menu.
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How to disable the Ctrl+Alt+Del and Alt+Tab commands.
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How to enable the user to drag and drop items between list boxes.
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How to create your own 'tutorial' to demonstate features in your application.
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How to provide status messages when the mouse is over menu items.
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How to prevent a form from being resized outside specified values.
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How to display a popup menu.
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An example program using the Toolbar control.
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Hide the mouse cursor in a Visual Basic application.
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Restrict the movement of the mouse to a certain area.
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How to add pop-up menu support to the Rich Textbox control.
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How to determine if the Caps Lock is on or off.
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How to hide the mouse cursor.
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How to create a Hot Key for your application.