WM_LBUTTONDBLCLK

This message is posted when the user double-taps the touch-screen while the stylus is pressed to the touch screen in the client area of a window. If the stylus is not captured, the message is posted to the window beneath the stylus position. Otherwise, the message is posted to the window that has captured the mouse.

At a Glance

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

Syntax

WM_LBUTTONDBLCLK 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_MBUTTON	Set if the middle mouse button is down.
MK_RBUTTON	Set if the right 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

Only windows that have the CS_DBLCLKS style can receive WM_LBUTTONDBLCLK messages, which the system generates when the user presses, releases, and again presses the left mouse button within the system’s double-click time limit. Double-clicking the left mouse button actually generates four messages: WM_LBUTTONDOWN, WM_LBUTTONUP, WM_LBUTTONDBLCLK, and WM_LBUTTONUP again.

An application can use the MAKEPOINTS macro to convert the lParam parameter to a POINTS structure.