VideoPortCompareMemory function (video.h)
The VideoPortCompareMemory function compares two blocks of system memory, byte-by-byte, and returns the number of compared bytes that are equivalent.
Syntax
VIDEOPORT_API ULONG VideoPortCompareMemory(
PVOID Source1,
PVOID Source2,
SIZE_T Length
);
Parameters
Source1
Pointer to the first block of memory to compare.
Source2
Pointer to the second block of memory to compare.
Length
Specifies the number of bytes to be compared.
Return value
VideoPortCompareMemory returns the number of bytes that are equivalent. If both blocks are equivalent, it returns the Length parameter.
Remarks
The values in the Source1 and Source2 parameters must be in a mapped logical range returned by VideoPortGetDeviceBase and/or a system space RAM address, such as an address on the stack.
Callers of VideoPortCompareMemory can be running at any IRQL if both blocks of memory are resident.
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 | Any level (see Remarks section) |