problems with MapViewOfFile

the code :
short* sig = (short * ) MapViewOfFile (hCubeMapping,
FILE_MAP_COPY,
offset >> 32,
offset,
size);
works perfectly when offset = 0, but fails when offset is greater. I know that the offset must be a multiple of the allocation granularity (64K), but it returns NULL in any case. Please, help me to solve this problem

Perhaps the problem is in your use of the Bitwise shift operator. I suspect that the dwFileOffsetHigh and dwFileOffsetLow aren't being set correctly. I think it works when offset is 0 because bit-shifting zero is still zero, however when you use a non-zero offset, the bitwise math is probably incorrect.

Good Luck.
John