WM_LBUTTONDOWN

Important:
This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.

This message is posted when the user presses the touch-screen in the client area of a window. If the stylus event is not captured, the message is posted to the window beneath the stylus position. Otherwise, the message is posted to the window that has the capture.

WM_LBUTTONDOWN
fwKeys= 
wParam; 
xPos=
LOWORD(
lParam); 
yPos= 
HIWORD(
lParam);

Parameters

fwKeys

Indicates whether various virtual keys are down. It is any combination of the following values:

Value	Description
MK_CONTROL	Set if the CTRL key is down.
MK_LBUTTON	Set if the left mouse button is down.
MK_SHIFT	Set if the SHIFT key is down.

xPos

Value of the low-order word of lParam. Specifies the x-coordinate of the cursor. The coordinate is relative to the upper-left corner of the client area.

yPos

Value of the high-order word of lParam. Specifies the y-coordinate of the cursor. The coordinate is relative to the upper-left corner of the client area.

Return Values

An application should return zero if it processes this message.

Remarks

An application can use the MAKEPOINTSmacro to convert the lParamparameter to a POINTSstructure.

Requirements

Runs on	Versions	Defined in	Include	Link to
Windows CE OS	1.0 and later	Winuser.h

Note This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.