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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
This call returns the video display configuration.
Syntax
VioGetConfig (ConfigID, ConfigData, VioHandle)
Parameters
;ConfigID (USHORT) - input: Identifies for which display configuration information is being requested: ::0 - Current configuration ::1 - Primary configuration ::2 - Secondary configuration :For OS/2 1.2, when ConfigID = 0, the current configuration is returned rather than the primary configuration (as was returned in OS/2 1.0 and 1.1). This change makes the OS/2 mode version of VioGetConfig match the family API version that has returned the current configuration starting with OS/2 1.0. OS/2 1.0 and 1.1 applications that issued VioGetConfig to determine the display configuration benefit from this change. The application can run on the configuration selected by the operator (by issuing the MODE command before invoking the application) rather than switching away from the operator selected display. ;ConfigData (PVIOCONFIGINFO) - output: Address of structure where the display configuration is returned. ;VioHandle (HVIO) - input : This must be zero unless the caller is a Presentation Manager application, in which case it must be the value returned by VioGetPs.
Return Code
;rc (USHORT) - return:Return code descriptions are: *0 NO_ERROR *421 ERROR_VIO_INVALID_PARMS *436 ERROR_VIO_INVALID_HANDLE *438 ERROR_VIO_INVALID_LENGTH *465 ERROR_VIO_DETACHED
Remarks
The values returned may not be correct if the adapter cannot be properly identified by the Base Video Handler (BVH) selected at system installation time. It can also be incorrect if the physical setup does not match that indicated by the presence of the adapter or by adapter switches. For example, it is impossible to detect the absence of a display on a CGA or the display attached to an EGA, despite the setup switches.
Bindings
C
<PRE> typedef struct _VIOCONFIGINFO { /* vioin */
USHORT cb ; /* Length of this data structure */
USHORT adapter; /* Display adapter type */
USHORT display; /* Display/monitor type */
ULONG cbMemory; /* Amount of memory on the adapter
in bytes */
USHORT Configuration;
USHORT VDHVersion;
USHORT Flags;
ULONG HWBufferSize;
ULONG FullSaveSize;
ULONG PartSaveSize;
USHORT EMAdaptersOFF; /* Offset to emulated adapter types */
USHORT EMDisplaysOFF; /* Offset to emulated display types */
} VIOCONFIGINFO;
#define INCL_VIO
USHORT rc = VioGetConfig(ConfigID, ConfigData, VioHandle);
USHORT ConfigID; /* Configuration ID */ PVIOCONFIGINFO ConfigData; /* Configuration data */ HVIO VioHandle; /* Vio handle */
USHORT rc; /* return code */ </PRE>
MASM
<PRE> VIOCONFIGINFO struc
vioin_cb dw ? ;Length of this data structure vioin_adapter dw ? ;Display adapter type vioin_display dw ? ;Display/monitor type vioin_cbMemory dd ? ;Amount of memory on the adapter in bytes vioin_Configuration dw ? ; vioin_VDHVersion dw ? ; vioin_Flags dw ? ; vioin_HWBufferSize dd ? ; vioin_FullSaveSize dd ? ; vioin_PartSaveSize dd ? ; vioin_EMAdaptersOFF dw ? ;Offset to emulated adapter types vioin_EMDisplaysOFF dw ? ;Offset to emulated display types
VIOCONFIGINFO ends
EXTRN VioGetConfig:FAR INCL_VIO EQU 1
PUSH WORD ConfigID ;Configuration ID PUSH@ OTHER ConfigData ;Configuration data PUSH WORD VioHandle ;Vio handle CALL VioGetConfig
Returns WORD </PRE>