MouSetScaleFact

Assigns a new set of scaling factors to the current mouse device driver.

Syntax

#define INCL_MOU
#include <os2.h>

PSCALEFACT    ScaleStruct;   /*  Address of scaling factors. */
HMOU          DeviceHandle;  /*  Reserved.  Must be 0. */
APIRET        rc;            /*  Return code */

rc = MouSetScaleFact(ScaleStruct, DeviceHandle);

Parameters

ScaleStruct (PSCALEFACT) - input

Address of scaling factors.

The address of the control block structure that contains the current row-and-column coordinate scaling factors. The scaling factors must be greater than or equal to 1 and less than or equal to (32K-1).

DeviceHandle (HMOU) - input

Reserved. Must be 0.

Return Code

rc (APIRET) - returns

MouSetScaleFact returns one of the following values:

• 0 NO_ERROR
• 387 ERROR_MOUSE_INV_PARMS
• 466 ERROR_MOU_DETACHED
• 501 ERROR_MOUSE_NO_CONSOLE

Remarks

MouSetScaleFact sets the mickey-to-pixel ratio for mouse motion. The row scale and column scale ratios specify a number of mickeys for each 8 pixels. The default value for the row scale is 16 mickeys for each 8 pixels. The default value for the column scale is 8 mickeys to 8 pixels.

The number of pixels moved does not have to be one-to-one for the number of mickeys the mouse moves. The scaling factor defines a sensitivity for the mouse that is a ratio of the number of mickeys required to move the cursor 8 pixels on the screen. The sensitivity determines at what rate the cursor moves on the screen.