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The VideoPortReadRegisterUlong function reads a ULONG value from a mapped register range.
Syntax
VIDEOPORT_API ULONG VideoPortReadRegisterUlong(
PULONG Register
);
Parameters
Register
Pointer to the register. The given Register must be in a mapped memory-space range returned by VideoPortGetDeviceBase.
Return value
VideoPortReadRegisterUlong returns the ULONG value read from the adapter.
Remarks
A miniport driver's HwVidInterrupt or HwVidSynchronizeExecutionCallback function can call VideoPortReadRegisterUlong.
Callers of VideoPortReadRegisterUlong can be running at any IRQL, provided that the memory pointed to by the Register parameter is resident, mapped device memory.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available in Windows 2000 and later versions of the Windows operating systems. |
| Target Platform | Desktop |
| Header | video.h (include Video.h) |
| Library | Videoprt.lib |
| DLL | Videoprt.sys |
| IRQL | See Remarks section. |