C# Signature:

[DllImport("Advapi32.dll", SetLastError = true, SetLastError=true, EntryPoint="CredWriteW", CharSet=CharSet.Unicode)]
static extern bool CredWrite([In] Credential userCredential, [In] UInt32 flags);

VB Signature:

Declare Function CredWrite Lib "advapi32.dll" (TODO) As TODO

User-Defined Types:

[StructLayout(LayoutKind.Sequential)]
private struct Credential
{
     public UInt32 flags;
     public UInt32 type;
     public string targetName;
     public string comment;
     public COMTypes.FILETIME lastWritten;
     public UInt32 credentialBlobSize;
     public IntPtr credentialBlob;
     public UInt32 persist;
     public UInt32 attributeCount;
     public IntPtr credAttribute;
     public string targetAlias;
     public string userName;
}

Notes:

None.

Tips & Tricks:

Needs extensive custom marshaling code. See CredRead to for an example on the custom marshaling code.

Sample Code:

internal static void AddDomainUserCredential(string target, string userName, string password)
{
     Credential userCredential = new Credential();

     userCredential.targetName = target;
     userCredential.type = CredentialTypeDomainPassword;
     userCredential.userName = userName;
     userCredential.attributeCount = 0;
     userCredential.persist = CredentialPersistEnterprise;
     byte[] bpassword = Encoding.Unicode.GetBytes(password);
     userCredential.credentialBlobSize = (UInt32)bpassword.Length;
     userCredential.credentialBlob = Marshal.StringToCoTaskMemUni(password);
     if (!Unmanaged.CredWrite(ref userCredential, 0))
     {
     throw new Win32Exception(Marshal.GetLastWin32Error());
     }
}

Alternative Managed API:

Do you know one? Please contribute it!

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).