C# Signatures:

// When calling with any variable parameters and Ansi
[DllImport("msvcrt.dll", CharSet = CharSet.Ansi,
    CallingConvention = CallingConvention.Cdecl)]
static extern int sprintf(
    StringBuilder buffer,
    string format,
    __arglist);

// When calling with any variable parameters and Unicode
[DllImport("msvcrt.dll", CharSet = CharSet.Unicode,
    CallingConvention = CallingConvention.Cdecl)]
static extern int swprintf(
    StringBuilder buffer,
    string format,
    __arglist);

// When calling with 1 arg
[DllImport("msvcrt.Dll", CallingConvention=CallingConvention.Cdecl)]
static extern int sprintf([In,Out]StringBuilder buffer, String fmt,
    String arg1);

// When calling with 2 args
[DllImport("msvcrt.Dll", CallingConvention=CallingConvention.Cdecl)]
static extern int sprintf([In,Out]StringBuilder buffer, String fmt,
    String arg1, String arg2);

// When calling with 3 args
[DllImport("msvcrt.Dll", CallingConvention=CallingConvention.Cdecl)]
static extern int sprintf([In,Out]StringBuilder buffer, String fmt,
    String arg1, String arg2, String arg3);

VB Signature:

<DllImport("msvcrt.dll", CharSet:=CharSet.Ansi,
  CallingConvention:=CallingConvention.Cdecl,
  ExactSpelling:=True)> _
  Public Shared Function sprintf(ByVal TargetString As System.Text.StringBuilder,
    ByVal  FormatSpecifier As String, ByVal i As Int32) As Int32
  End Function

User-Defined Types:

None.

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

StringBuilder buffer = new StringBuilder(255);

swprintf(buffer, "Greetings from thread %d\n", __arglist(Thread.CurrentThread.ManagedThreadId));

Console.WriteLine(buffer.ToString());

Please add some!

Alternative Managed API:

System.String.Format()

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).