en:docs:fapi:mougetscalefact

This is part of Family API which allow to create dual-os version of program runs under OS/2 and DOS

Note: This is legacy API call. It is recommended to use 32-bit equivalent

2021/09/17 06:47 · prokushev
2021/08/20 05:18 · prokushev

MouGetScaleFact

This call returns a pair of 1-word scaling factors for the current mouse device.

Syntax

MouGetScaleFact (ScaleStruct, DeviceHandle)

Parameters

  • ScaleStruct (PSCALEFACT) - output: Address of the control block structure that contains the current row and column coordinate scaling factors.

See MouSetScaleFact for more information.

  • DeviceHandle (HMOU) - input: Contains the handle of the mouse device obtained from a previous MouOpen.

Return Code

rc (USHORT) - return:Return code descriptions are:

  • 0 NO_ERROR
  • 385 ERROR_MOUSE_NO_DEVICE
  • 466 ERROR_MOU_DETACHED
  • 501 ERROR_MOUSE_NO_CONSOLE
  • 505 ERROR_MOU_EXTENDED_SG

Remarks

The units of the scale factor depend on the mode of the display screen for the session. If the screen is operating in text mode, the scaling units are relative to characters. If the screen is operating in graphics mode, the scaling units are relative to pels.

Bindings

C

typedef struct _SCALEFACT { /* mousc */
  USHORT rowScale;          /* row scaling factor */
  USHORT colScale;          /* column coordinate scaling factor */
} SCALEFACT;
 
#define INCL_MOU
 
USHORT  rc = MouGetScaleFact(ScaleStruct, DeviceHandle);
 
PSCALEFACT ScaleStruct;   /* 2-word structure */
HMOU       DeviceHandle;  /* Mouse device handle */
 
USHORT     rc;            /* return code */

MASM

SCALEFACT struc
  mousc_rowScale  dw  ? ;row scaling factor
  mousc_colScale  dw  ? ;column coordinate scaling factor
SCALEFACT ends
 
EXTRN  MouGetScaleFact:FAR
INCL_MOU            EQU 1
 
PUSH@  OTHER   ScaleStruct   ;2-word structure
PUSH   WORD    DeviceHandle  ;Mouse device handle
CALL   MouGetScaleFact
 
Returns WORD

en/docs/fapi/mougetscalefact.txt · Last modified: 2021/11/04 14:13 by prokushev