DosGetResource (OS/2 1.x)

This call returns the segment selector of the specified resource segment.

Syntax
DosGetResource (ModHandle, TypeID, NameID, Selector)

Parameters

 * ModHandle (HMODULE) - input: The location of the resource segment.
 * 0 - The executable file of the current process.
 * <> 0 - A handle to a dynamic link module returned by DosLoadModule.


 * TypeID (USHORT) - input : A 16 bit resource type ID (see Remarks).
 * NameID (USHORT) - input : A 16 bit resource name ID (see Remarks).
 * Selector (PSEL) - output : The address of a word where the resource segment selector is returned.

Return Code

 * rc (USHORT) - return:Return code descriptions are:
 * 0 NO_ERROR
 * 6 ERROR_INVALID_HANDLE

Remarks
Resource segments are read-only data segments that can be accessed dynamically at run time. The access key consists of two 16-bit numbers, the first of which is a type ID and the second, a name ID. These numbers are similar in concept to the file extension and file name portions of a file name.

The advantage of resource segments is that they can be bundled into an application's executable file, so a single file contains all of the code and data for an application.

It is recommended that resource segments obtained through DosGetResource only be freed using DosFreeSeg.

OS/2 Version 1.2 added two new functions, DosGetResource2 and DosFreeResource, to load and free an application specific resource. DosGetResource2 returns a far pointer to a resource rather than the selector returned via DosGetResource. It is recommended that applications targeted for OS/2 1.2 use DosGetResource2 and DosFreeResource. Applications that wish to execute on OS/2 1.1 and 1.2 should use the OS/2 run-time dynamic link capabilities, DosLoadModule and DosGetProcAddr, to get the address of DosGetResource2 and DosFreeResource when executing on OS/2 1.2. If the DosGetProcAddr call to obtain the address of DosGetResource2 and DosFreeResource fails, the application can call DosGetResource and DosFreeSeg. Applications that use DosGetResource2 and DosFreeResource allow OS/2 to optimize memory allocation associated with the applications resource.

C

 * 1) define INCL_DOSRESOURCES

USHORT rc = DosGetResource(ModHandle, TypeID, NameID, Selector);

HMODULE ModHandle;    /* Module handle to get resource from */ USHORT TypeID;        /* 16 bit resource type ID */ USHORT NameID;        /* 16 bit resource name ID */ PSEL   Selector;      /* where to return selector */

USHORT rc;            /* return code */ 

MASM
 EXTRN DosGetResource:FAR INCL_DOSRESOURCES  EQU 1

PUSH  WORD    ModHandle    ;Module handle to get resource from PUSH  WORD    TypeID       ;16 bit resource type ID PUSH   WORD    NameID       ;16 bit resource name ID PUSH@  WORD    Selector     ;Resource selector (returned) CALL  DosGetResource

Returns WORD 