pulTmrFreq (PULONG) - output

Timer Frequency.

Provides the frequency of the IRQ0 high resolution timer in hertz (timer units/sec).

rc (APIRET) - returns

Return Code.

DosTmrQueryFrequency returns the following values:

• NO_ERROR 87
  ERROR_INVALID_PARAMETER
  535
  ERROR_TMR_NO_DEVICE
  99
  ERROR_DEVICE_IN_USE
  For a full list of error codes, see Errors.