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# CredPackAuthenticationBuffer
### C# Signature:
```cs
[DllImport("credui.dll", CharSet = CharSet.Unicode, SetLastError = true)]
private static extern Boolean CredPackAuthenticationBuffer(
int dwFlags,
string pszUserName,
string pszPassword,
IntPtr pPackedCredentials,
ref int pcbPackedCredentials);
```
### VB Signature:
```cs
'''
''' Windows Platform function (called via pInvoke) which populates an authentication buffer with authentication details.
''' See http://msdn.microsoft.com/en-us/library/aa374802(v=vs.85).aspx
'''
''' RESERVED - must be zero.
''' User Name.
''' Password.
''' The buffer to be packed with credentials.
''' The the size of the buffer.
''' True on success; otherwise False. For extended error information, call the GetLastError() function.
_
Public Shared Function CredPackAuthenticationBuffer(ByVal dwFlags As UInt32, ByVal pszUserName As String, ByVal pszPassword As String, ByVal pPackedCredentials As IntPtr, ByRef pcbPackedCredentials As UInt32) As Boolean
End Function
```
### Sample Code:
```cs
string username = "User";
string password = "";
int inCredSize = 1024;
IntPtr inCredBuffer = Marshal.AllocCoTaskMem(inCredSize);
CredPackAuthenticationBuffer(0, username, password, inCredBuffer, ref inCredSize);
```
---
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