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include dosnet.inc VxDcall DOSNET_Send_FILESYSCHANGE |
The DOSNET_Send_FILESYSCHANGE service specifies whether the given drive is local to the virtual machine. If the drive is local, the WM_FILESYSCHANGE message can be broadcast to Windows applications when changes to the drive are made by MS-DOS applications.
AL
Specifies the drive number (0 = A, 1 = B, and so on).
EBX
Specifies the handle of the virtual machine to check.
The carry flag is clear if the WM_FILESYSCHANGE message will be sent for the specified drive. Otherwise, the carry flag is set to prevent messages for the drive.
This service is designed exclusively for the virtual DOSNET device. Other virtual devices should not provide their own implementations, however, they can hook this service. Since the virtual DOSNET device does not install if there is no redirector, a virtual device which hooks this service must ship with a modified DOSNET device which always loads.
A virtual device must not send a WM_FILESYSCHANGE message for a drive that this service has not acknowledged. Sending a message incorrectly can result in unexpected errors in Windows applications.
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