Binary Resource Files

The binary resource file created by the Resource Compiler consists of one or more resource entries, each in the following form:

  struct {
      UCHAR  fResType;
      USHORT usResType;
      union {
          struct {
              UCHAR  fResID;
              USHORT resid;
          };
          UCHAR resname[];
      };
      USHORT fsOptions;
      ULONG  cb;
      BYTE   bytes[1];
  };

The fields in each entry have the following meanings:

fRestype

Specifies whether the resource-type identifier is a string or an integer. For OS/2, the resource type is always an integer and this field is set to 0xFF.
usResType
Specifies the resource-type identifier. This value is a signed integer in the range -32768 through 32767, an unsigned integer in the range of 1 through 65535, or a character string. The following resource types are predefined:

RT_ACCELTABLE

Accelerator table
RT_BITMAP
Bitmap
RT_CHARTBL
Character table
RT_DIALOG
Dialog template
RT_DISPLAYINFO
Display information
RT_DLGINCLUDE
Dialog include-file name
RT_FKALONG
Long-form function-key area
RT_FKASHORT
Short-form function-key area
RT_FONT
Font
RT_FONTDIR
Font directory
RT_HELPSUBTABLE
Help subtable
RT_HELPTABLE
Help table
RT_KEYTBL
Key table
RT_MENU
Menu template
RT_MESSAGE
Error-message table
RT_POINTER
Mouse-pointer shape
RT_RCDATA
Binary data
RT_STRING
String table
RT_VKEYTBL
Virtual key table
RT_RESNAMES
String ID table
fResID
Specifies whether the resource identifier is a string or an integer. For the OS/2 operating system, this field is set to 0xFF to indicate that the resource identifier is an integer.
resid
Specifies the resource identifier. This value is an unsigned integer in the range of 1 through 65535.
resname
Specifies a string resource identifier as a sequence of characters ending with a 0x00 value.
fsOptions
Specifies the load and memory options. This value can be a combination of the following:

0x0010

MOVEABLE resource. If not given, the resource is FIXED.
0x0040
PRELOAD resource. If not given, the resource is LOADONCALL.
0x1000
DISCARDABLE resource.
cb
Specifies the size of the resource (in bytes).
bytes
Contains the resource.

Note: There is a size limitation of 65280 bytes for a binary resource file.

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