Using WriteFile [modified]

[capricious_001]

Hi there, I was wondering as to how one would use the WriteFile function. Say i have the following

HANDLE hOutput;
LPSTR = "Hello World";
LPCVOID pBuffer;

hOutput = CreateFile(TEXT("ouput.txt"), GENERIC_WRITE, FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, 0, NULL);

WriteFile(hOutput, pBuffer, sizeof(pBuffer),&dwWritten, NULL);

CloseHandle(hOutput);

How would I "place" the "Hello World" string into the pBuffer? The output file is being created however there is some gibberish in the text and not what I want. As well, WriteFile does fail and does return false. Any help would be appreciated! Thanks, Robbie -- modified at 21:04 Sunday 18th June, 2006

[Michael Dunn]

The buffer is a pointer to the block of bytes you want to write: LPCSTR pData = "Hello World"; WriteFile(hOutput, (const void*) pData, strlen(pData), &dwWritten, NULL);

--Mike-- Visual C++ MVP :cool: LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ VB > soccer

[capricious_001]

lol omg that is so embaressing. I was using bytes instead of strlen, so i was wondering why my stuff was getting cut off in the text file. However thanks alot for solving the problem for me Mike, I appreciate it. Robbie

[Stephen Hewitt]

The (const void*) cast is not needed; all pointers can be implicitly cast to a void* pointer and a non-const pointer can be implicitly cast to a const one. Casts which aren’t needed often turn out to be maintenance problems or even bugs as a project evolves. Steve