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WM_MOUSEMOVE

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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.

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

OS Versions: Windows CE 1.0 and later.
Header: Windows.h.

See Also

GetCapture | SetCapture

 Last updated on Wednesday, April 14, 2004

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