Before a new document is opened, this frees up any data from a previously opened document. This is a parameter of the VAPIM_DRAW
message.
SendMessage(g_hWndVAPI, VAPIM_DRAW, DRAW_SHUTDOWN, 0L );
Argument | Description |
---|---|
g_hWndVapi
|
The handle of the VAPI window |
uMsg
|
VAPIM_DRAW
|
wParam
|
VAPIMWP_DRAW_SHUTDOWN
|
lParam
|
Not used, set to 0 |
SendMessage()
returns:
VAPI_RETURN_SUCCESS
(or TRUE
, value 1
) if the call succeeds.VAPI_RETURN_NOT_INITIALIZED
(value 5
) if the drawing routines have not been initialized.VAPI_RETURN_ERROR
(or FALSE
, value 0
) if the call fails.VAPIM_DRAW
messages are used in the sample drawdemo
program.