WM_LBUTTONDOWN

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.

At a Glance

Header file:	Winuser.h
Windows CE versions:	1.0 and later

Syntax

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 MAKEPOINTS macro to convert the lParam parameter to a POINTS structure.