![]() The system applies two tests to the specified relative mouse motion when applying acceleration. An application obtains and sets these values with the SystemParametersInfo function. An end user sets these values using the Mouse application in Control Panel. Relative mouse motion is subject to the settings for mouse speed and acceleration level. Positive values mean the mouse moved right (or down) negative values mean the mouse moved left (or up). If the MOUSEEVENTF_ABSOLUTE value is not specified,ĭy specify relative motions from when the last mouse event was generated (the last reported position). Coordinate (0,0) maps onto the upper-left corner of the display surface, (65535,65535) maps onto the lower-right corner. ![]() The event procedure maps these coordinates onto the display surface. If MOUSEEVENTF_ABSOLUTE value is specified,ĭy contain normalized absolute coordinates between 0 and 65,535. The information is specified as absolute or relative integer values. If the mouse has moved, indicated by MOUSEEVENTF_MOVE being set,ĭy hold information about that motion. ![]() An application calls GetMessageExtraInfo to obtain this extra information. Set if the second X button was pressed or released.Īn additional value associated with the mouse event. Set if the first X button was pressed or released. This value may be any combination of the following flags.ĭwFlags is not MOUSEEVENTF_WHEEL, MOUSEEVENTF_XDOWN, or MOUSEEVENTF_XUP, then A positive value indicates that the wheel was tilted to the right a negative value indicates that the wheel was tilted to the left.ĭwFlags contains MOUSEEVENTF_XDOWN or MOUSEEVENTF_XUP, thenĭwData specifies which X buttons were pressed or released. If dwFlags contains MOUSEEVENTF_HWHEEL, thenĭwData specifies the amount of wheel movement. One wheel click is defined as WHEEL_DELTA, which is 120. A positive value indicates that the wheel was rotated forward, away from the user a negative value indicates that the wheel was rotated backward, toward the user. Absolute data is specified as the mouse's actual y-coordinate relative data is specified as the number of mickeys moved.ĭwData specifies the amount of wheel movement. The mouse's absolute position along the y-axis or its amount of motion since the last mouse event was generated, depending on the setting of MOUSEEVENTF_ABSOLUTE. Mickey is the amount that a mouse has to move for it to report that it has moved. Absolute data is specified as the mouse's actual x-coordinate relative data is specified as the number of mickeys moved. The mouse's absolute position along the x-axis or its amount of motion since the last mouse event was generated, depending on the setting of MOUSEEVENTF_ABSOLUTE. You cannot specify both MOUSEEVENTF_WHEEL and either MOUSEEVENTF_XDOWN or MOUSEEVENTF_XUP simultaneously in theĭwFlags parameter, because they both require use of the Similarly, MOUSEEVENTF_LEFTUP is set only when the button is first released. For example, if the left mouse button is pressed and held down, MOUSEEVENTF_LEFTDOWN is set when the left button is first pressed, but not for subsequent motions. The values that specify mouse button status are set to indicate changes in status, not ongoing conditions. The wheel has been moved, if the mouse has a wheel. For further information about relative mouse motion, see the following Remarks section. This flag can be set, or not set, regardless of what kind of mouse or mouse-like device, if any, is connected to the system. If not set, those parameters contain relative data: the change in position since the last reported position. Valueĭy parameters contain normalized absolute coordinates. This parameter can be certain combinations of the following values. Controls various aspects of mouse motion and button clicking.
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