Opening and reading files

[ChimpFace9000]

Could someone show me how to open and read files using the standerd win32 api? From what i know your supposed to use CreateFile to open a file, but i just couldnt figure out how to use it.

[Vlatko]

As parksie said, i really love these functions:

BOOL SaveFile(HWND hEdit, LPSTR pszFileName)
{
HANDLE hFile;
BOOL bSuccess = FALSE;

hFile = CreateFile(pszFileName, GENERIC_WRITE, NULL, NULL,
CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if(hFile != INVALID_HANDLE_VALUE)
{
DWORD dwTextLength;
dwTextLength = GetWindowTextLength(hEdit);
if(dwTextLength > 0)// No need to bother if there's no text.
{
LPSTR pszText;
pszText = (char*)GlobalAlloc(GPTR, dwTextLength + 1);
if(pszText != NULL)
{
if(GetWindowText(hEdit, pszText, dwTextLength + 1))
{
DWORD dwWritten;
if(WriteFile(hFile, pszText, dwTextLength, &dwWritten, NULL))
bSuccess = TRUE;
}
GlobalFree(pszText);
}
}
CloseHandle(hFile);
}
return bSuccess;
}

BOOL LoadFile(HWND hEdit, LPSTR pszFileName)
{
HANDLE hFile;
BOOL bSuccess = FALSE;

hFile = CreateFile(pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, NULL, NULL);
if(hFile != INVALID_HANDLE_VALUE)
{
DWORD dwFileSize;
dwFileSize = GetFileSize(hFile, NULL);
if(dwFileSize != 0xFFFFFFFF)
{
LPSTR pszFileText;
pszFileText = (char*)GlobalAlloc(GPTR, dwFileSize + 1);
if(pszFileText != NULL)
{
DWORD dwRead;
if(ReadFile(hFile, pszFileText, dwFileSize, &dwRead, NULL))
{
pszFileText[dwFileSize] = 0; // Null terminator
if(SetWindowText(hEdit, pszFileText))
bSuccess = TRUE; // It worked!
}
GlobalFree(pszFileText);
}
}
CloseHandle(hFile);
}
return bSuccess;
}

Ya, theForger wrote them, but i want to learn to use the two functions mentioned earlier.

[parksie]

http://msdn.microsoft.com/library/default.asp?URL=/library/psdk/winbase/filesio_7wmd.htm