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LAnnotationWindow::OnDraw

#include "ltwrappr.h"

virtual L_VOID LAnnotationWindow::OnDraw(hdc, Rect)

HDC hdc;	/* the device context */
RECT& Rect;	/* the rectangle to be updated */

This function is called whenever the class object updates its window.

Parameter	Description
hdc	The device context of the bitmap window.
Rect	The bitmap window rectangle to be updated.

Returns

None

Comments

Override this function if you want to do your own drawing on the class object's window.

This function will be called following the class object's own processing of the WM_PAINT message.

The rect parameter is passed by reference, and is a required parameter.

This function is overridden by the LAnnotationWindow to allow the class object to render the annotations to the window. If you override this function then you must call the parent-class implementation of this function for default processing.

Required DLLs and Libraries

LTANN LTDIS LTDLG LTEFX LTFIL LTIMG LTSCR LTTWN For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

See Also

Functions:	Class Members
Topics:	Implementing Special Effects

Example

For an example, refer to LAnnotationWindow::OnZoom.