C# Signature:

/// <summary>
/// Tests a given string to determine if it conforms to a valid URL format.
/// </summary>
/// <param name="pszPath">A pointer to a null-terminated string of maximum length MAX_PATH that contains the URL path to validate.</param>
/// <returns>Returns TRUE if pszPath has a valid URL format, or FALSE otherwise.</returns>
[DllImport("shlwapi.dll", EntryPoint = "PathIsURLW",  SetLastError = True, CharSet = CharSet.Unicode)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool PathIsURL([MarshalAs(UnmanagedType.LPTStr)]string pszPath);

VB.NET Signature

''' <summary>
''' Tests a given string to determine if it conforms to a valid URL format.
''' </summary>
''' <param name="pszPath">A pointer to a null-terminated string of maximum length MAX_PATH that contains the URL path to validate.</param>
''' <returns>Returns TRUE if pszPath has a valid URL format, or FALSE otherwise.</returns>
<DllImport("shlwapi.dll", EntryPoint:="PathIsURLW",  SetLastError:=True, CharSet:=CharSet.Unicode)> _
Public Function PathIsURL(<MarshalAs(UnmanagedType.LPTStr)>pszPath As String) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

VB Signature:

Public Declare Function PathIsURL Lib "shlwapi" Alias "PathIsURLA" _
        (ByVal pszPath As String) As Long

User-Defined Types:

None.

Alternative Managed API:

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Notes:

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