MFSH UNPHYSTOVIRT

Release the selector allocated previously by calling MFSH_PHYSTOVIRT.

Syntax
int far pascal MFSH_UNPHYSTOVIRT(usSel)unsigned short usSel;

Parameters

 * usSel : contains the selector to released.

Returns
If no error is detected, a zero error code is returned. If an error is detected, the following error code is returned:
 * ERROR_PROTECTION_VIOLATION: the supplied selector is invalid.

Sample
unsigned short usSel; int far pascal MFSH_UNPHYSTOVIRT(usSel)

Remarks
This helper is for use by a mini-FSD with an imbedded device driver. It is the same as the standard device driver UNPHYSTOVIRT helper.

A caller must issue a corresponding UNPHYSTOVIRT after calling PHYSTOVIRT, before returning to its caller or using any other helpers.