The import header contains the following fields and offsets:
| Offset | Size | Field | Description |
| 0 | 2 | Sig1 | Must be IMAGE_FILE_MACHINE_UNKNOWN. See Section 3.3.1, "Machine Types, " for more information. |
| 2 | 2 | Sig2 | Must be 0xFFFF. |
| 4 | 2 | Version | |
| 6 | 2 | Machine | Number identifying type of target machine. See Section 3.3.1, "Machine Types, " for more information. |
| 8 | 4 | Time-Date Stamp | Time and date the file was created. |
| 12 | 4 | Size Of Data | Size of the strings following the header. |
| 16 | 2 | Ordinal/Hint | Either the ordinal or the hint for the import, determined by the value in the Name Type field. |
| 18 | 2 bits | Type | The import type. See Secttion 8.2 Import Type for specific values and descriptions. |
| 3 bits | Name Type | The Import Name Type. See Section 8.3.8.3 Import Name Type for specific values and descriptions. | |
| 11 bits | Reserved | Reserved. Must be zero. |
This structure is followed by two null-terminated strings describing the imported symbol's name, and the dll from which it came.