FWrite3 Function | |
Write the contents of a buffer to an open file.
Namespace:
XSharp.RT
Assembly:
XSharp.RT (in XSharp.RT.dll) Version: 2.19
Syntax FUNCTION FWrite3(
ptrHandle AS IntPtr,
ptrBuffer AS IntPtr,
dwBytes AS DWORD
) AS DWORD
public static uint FWrite3(
IntPtr ptrHandle,
IntPtr ptrBuffer,
uint dwBytes
)
Request Example
View SourceParameters
- ptrHandle
- Type: IntPtr
The handle of the file to write to. - ptrBuffer
- Type: IntPtr
A pointer to the buffer to write. - dwBytes
- Type: DWord
The number of bytes in ptrBuffer to write, beginning at the current file pointer position.
Return Value
Type:
DWord
The number of bytes written.
If the value returned is equal to
dwBytes, the operation was successful.
If the return value is less than
dwBytes or 0, this means that the length of
ptrBuffer is less than
dwBytes, or the disk is full, or another error has occurred. FError() can be used to determine the specific error.
Remarks
FWrite3() is a strongly-typed version of FWrite(). Moreover, the second argument in FWrite3() is a pointer to a buffer, instead of a string. See FWrite() for details.
Remarks Tip |
---|
This function is included for compatibility. We do not recomment using static memory for file i/o operations.
We recommend that you use the function overload that takes a byte array parameter in stead.
|
Examples
This example writes the contents of a PSZ to a file:.
1LOCAL pszBuff AS PSZ
2LOCAL ptrHandle AS PTR
3pszBuff := "hello"
4ptrHandle := FOpen2("temp.bin", FO_READWRITE)
5IF ptrHandle != F_ERROR
6 FWrite3(ptrHandle, pszBuff, PszLen(pszBuff)
7ENDIF
See Also