Classes and Member Functions > LAnnotationWindow > LAnnotationWindow Member Functions > LAnnotationWindow::OnDraw

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.

LAnnotationWindow::OnDraw

Returns

Comments

Example