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/DRIVER (Windows NT Kernel Mode Driver)

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The latest version of this topic can be found at -DRIVER (Windows NT Kernel Mode Driver).

DRIVER[:UPONLY | :WDM]

  
## Remarks  
 Use the /DRIVER linker option to build a Windows NT kernel mode driver.  
  
 **/DRIVER:UPONLY** causes the linker to add the **IMAGE_FILE_UP_SYSTEM_ONLY** bit to the characteristics in the output header to specify that it is a uniprocessor (UP) driver. The operating system will refuse to load a UP driver on a multiprocessor (MP) system.  
  
 **/DRIVER:WDM** causes the linker to set the **IMAGE_DLLCHARACTERISTICS_WDM_DRIVER** bit in the optional header's DllCharacteristics field.  
  
 If **/DRIVER** is not specified, these bits are not set by the linker.  
  
 If **/DRIVER** is specified:  
  
-  /FIXED:NO is in effect ([/FIXED (Fixed Base Address)](../Topic/-FIXED%20\(Fixed%20Base%20Address\).md)).  
  
-  The extension of the output file will be .sys. Use **/OUT** to change the default filename and extension ([/OUT (Output File Name)](../Topic/-OUT%20\(Output%20File%20Name\).md)).  
  
### To set this linker option in the Visual Studio development environment  
  
1.  Open the project's **Property Pages** dialog box. For details, see [Setting Visual C++ Project Properties](../Topic/Working%20with%20Project%20Properties.md).  
  
2.  Click the **Linker** folder.  
  
3.  Click the **System** property page.  
  
4.  Modify the **Driver** property.  
  
### To set this linker option programmatically  
  
1.  See `P:Microsoft.VisualStudio.VCProjectEngine.VCLinkerTool.driver`.  
  
## See Also  
 [Setting Linker Options](../Topic/Setting%20Linker%20Options.md)   
 [Linker Options](../Topic/Linker%20Options.md)