GetDriverStatus Method
Retrieves the status of the system driver.
Syntax
public int getDriverStatus(String productGUID, int module);
Remarks
This method retrieves the status of the system driver module specified by Module. This status can then be used to verify whether it has been properly installed and is ready for use.
The value returned by the method corresponds to the dwCurrentState field of the SERVICE_STATUS structure from the Windows API. It will be one of the following:
| MODULE_STATUS_NOT_PRESENT | 0x00000000 | The specified module is not present on the system. |
| MODULE_STATUS_STOPPED | 0x00000001 | The specified module is in the Stopped state. |
| MODULE_STATUS_RUNNING | 0x00000004 | The specified module is loaded and running. |
ProductGUID is used to distinguish between driver installations performed by different applications. Such information is necessary to guard against unexpected situations such as, e.g., the driver being uninstalled by one application despite other applications still needing it.
The GUID must be specified in so-called "Registry Format" (e.g., "{1FAD0EF2-9A03-4B87-B4BC-645B7035ED90}") with curly braces included.
To ensure proper operation, it is critical that each individual application have its own unique ProductGUID value, and that applications (and their installation scripts) use that value when calling any of the following methods:
The Module parameter specifies which driver module to query the status of. Possible values are:
| MODULE_PNP_BUS | 0x00000001 | PnP Bus Driver (.sys file).
This module must be installed if the application wishes to make use of Plug-and-Play (PnP) storage features. PnP storage devices are those visible as disks in the Device Manager, and the system treats such storage devices differently from other purely virtual devices. The filesystem driver must be re-installed anytime this module is added or removed. |
| MODULE_DRIVER | 0x00000002 | Core Product Driver (.sys file).
The product's filesystem driver module provides the core of its functionality; it must be installed for the product to function correctly. |
| MODULE_HELPER_DLL | 0x00010000 | Shell Helper DLL (CBFSShellHelper20.dll)
This module provides supplementary functionality; please refer to the Helper DLL topic for more information. Note: Not applicable when calling the GetDriverStatus method. |
This method is available in both the class API and the Installer DLL included with the product; please refer to the Driver Installation topic for more information about the latter.
Note: This method cannot be called within events.