Sending Messages

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Typically, an application sends message to send notifications of state changes or to broadcast information. Your component can broadcast messages to all the controls in a form, send messages to a particular control (or to the application itself), or even send messages to itself.

There are several different ways to send a Windows message. Which method you use depends on why you are sending the message. The following topics describe the different ways to send Windows messages:

• Broadcasting a Message to All Controls in a Form
• Calling a Control's Message Handler Directly
• Sending a Message Using the Windows Message Queue
• Sending a Message That Does Not Execute Immediately