WM_MOUSEMOVE
A version of this page is also available for
4/8/2010
This message is posted to a window when user moves the mouse while pressing the left mouse button or moves the stylus while the tip is down. If another window does not capture the mouse stylus input, the OS posts the message to the window that contains the cursor or the stylus tip. If another window captures the mouse or stylus input, the OS posts the message to the window that has the capture.
Syntax
WM_MOUSEMOVE fwKeys = wParam;
xPos = LOWORD(lParam);
yPos = HIWORD(lParam);
Parameters
fwKeys
Indicates the mouse buttons and keys that the user pressed. The following table shows the possible values, which can be combined.Value Description MK_CONTROL
The user pressed the CTRL key.
MK_LBUTTON
The user pressed the left mouse button.
MK_SHIFT
The user pressed the SHIFT key.
- xPos
Value of the low-order word of lParam. Specifies the x-coordinate of the cursor, 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, relative to the upper-left corner of the client area.
Requirements
| Header | windows.h |
| Windows Embedded CE | Windows CE 1.0 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |