pinvoke.net: Edit: advapi32.CryptGetDefaultProvider

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Summary: Used to determine the name of the default cryptographic service provider (CSP) of a specified provider type for the local computer or current user.

!!!!C# Signature:

[DllImport("advapi32.dll", SetLastError=true)]
 [return: MarshalAs(UnmanagedType.Bool)]
 static extern bool CryptGetDefaultProvider(
	UInt32 dwProvType,
	IntPtr pdwReserved,
	UInt32 dwFlags,
	StringBuilder pszProvName,
	ref IntPtr ProvName
 );

!!!!VB Signature:
 Declare Function CryptGetDefaultProvider Lib "advapi32.dll" (TODO) As TODO

!!!!User-Defined Types:
 // Possible values for dwFlags
 const UInt32 CRYPT_USER_DEFAULT = 0x00000002;
 const UInt32 CRYPT_MACHINE_DEFAULT = 0x00000001;

!!!!Alternative Managed API:
Do you know one?  Please contribute it!

!!!!Notes:
None.

!!!!Tips & Tricks:
Please add some!

!!!!Sample Code:
 StringBuilder providerName = new StringBuilder(255);
 IntPtr providerNameLen = new IntPtr(255);

if (CryptGetDefaultProvider(
	PROV_RSA_FULL,
	IntPtr.Zero,
	CRYPT_USER_DEFAULT,
	providerName,
	ref providerNameLen))
 {
	MessageBox.Show(String.Format("The default provider is {0}", providerName.ToString()));
 }
 else
 {
	MessageBox.Show("Unable to get the default provider");
 }

Documentation: CryptGetDefaultProvider@msdn on MSDN