hDC Property

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Defined By: GLControl

Description:

Specify a Handle Device Context (hDC) of a GLControl. The hDC is provided by the Windows environment.

Details:

As a method for managing the system display, the Windows environment assigns a handle for each GLControl in your application. Use the hDC property to refer to this handle, which supplies you with a value that you can pass to Windows API calls.

The device context provides the framework that defines the graphic modes that affect output, and defines a group of graphic objects and their attributes. The device context can never be accessed directly by an application. It is accessed indirectly by calling the various associated functions.

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Note: Do not store the hDC property value in a variable as it can change while a program is running. Rather, you should use the hDC property every time you need it.

Data Type: Long