PE_BEGININPUT
Begins default
input processing. Submessage of WM_PENEVENT.
Parameters
wParam
PE_BEGININPUT
lParam
The
high-order word is the handle of the window in which the pen first touched
down, and the low-order word is the event reference identifier returned from GetMessageExtraInfo.
Return Value
Returns
PCMR_OK if successful; otherwise, it returns one of the following values:
|
Constant |
Description |
|
PCMR_ALREADYCOLLECTING |
StartPenInput has already been called for this session. |
|
PCMR_APPTERMINATED |
The
application terminated input. |
|
PCMR_ERROR |
Parameter
or unspecified error. |
|
PCMR_INVALID_PACKETID |
A packet
identifier is invalid. |
|
PCMR_SELECT |
Press-and-hold
action was detected. Collection is not started. |
|
PCMR_TAP |
A tap was
detected. Collection is not started. |
Comments
A control can
initiate default pen-input processing by sending this message to its parent. If
the parent allows the message to be processed by passing it to DefWindowProc, default pen-input
behavior begins. The DoDefaultPenInput function uses this technique.
For further
information about default processing, refer to Chapter 2, Starting Out with System Defaults.
See Also