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XSharpLoadLibrary Function (RT)

Year Function (RT)

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

Copy

 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 Source

Parameters

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:.

Copy

1LOCAL pszBuff AS PSZ
2LOCAL ptrHandle AS PTR
3pszBuff := "hello" // psz converted data
4ptrHandle := FOpen2("temp.bin", FO_READWRITE)
5IF ptrHandle != F_ERROR
6    FWrite3(ptrHandle, pszBuff, PszLen(pszBuff)
7ENDIF

Reference

Functions, Globals and Defines