@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: The RegisterClassEx API registers a new window class to be created using CreateWindow or CreateWindowEx. !!!!C# Signature: [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.U2)] static extern short RegisterClassEx([In] ref WNDCLASSEX lpwcx); !!!!VB Signature: <DllImport("user32.dll")> _ Public Shared Function RegisterClassEx(ByRef lpwcx As WNDCLASSEX) As Short End Function !!!!User-Defined Types: [WNDCLASSEX] !!!!Sample Code(VB.NET): <StructLayout(LayoutKind.Sequential)> _ Private Structure WNDCLASSEX Public cbSize As UInteger Public style As ClassStyles Public lpfnWndProc As IntPtr Public cbClsExtra As Integer Public cbWndExtra As Integer Public hInstance As IntPtr Public hIcon As IntPtr Public hCursor As IntPtr Public hbrBackground As IntPtr Public lpszMenuName As String Public lpszClassName As String Public hIconSm As IntPtr Shared Function MakeNew() Dim nw As New WNDCLASSEX nw.cbSize = Marshal.SizeOf(GetType(WNDCLASSEX)) Return nw End Function End Structure <DllImport("user32.dll")> _ Private Shared Function RegisterClassEx(ByRef lpwcx As WNDCLASSEX) As Short End Function <DllImport("user32.dll")> _ Private Shared Function UnregisterClass(lpClassName As String, hInstance As IntPtr) As Boolean End Function Dim className As String = "Iranian_Persian_Class" Dim WndClass As WNDCLASSEX = WNDCLASSEX.MakeNew() With WndClass .style = 0 .lpfnWndProc = IntPtr.Zero .cbClsExtra = 0 .cbWndExtra = 0 .hInstance = IntPtr.Zero .hIcon = IntPtr.Zero .hCursor = IntPtr.Zero .hbrBackground = IntPtr.Zero .lpszMenuName = "" .lpszClassName = className .hIconSm = IntPtr.Zero End With Dim rVal As Short = RegisterClassEx(WndClass) If rVal = 0 Then MsgBox("an error occured") Else With WndClass MsgBox("Class atom: " & rVal.ToString & vbCrLf & _ "cbClsExtra: " & .cbClsExtra.ToString & vbCrLf & _ "cbSize: " & .cbSize.ToString & vbCrLf & _ "cbWndExtra: " & .cbWndExtra.ToString & vbCrLf & _ "hbrBackground: " & .hbrBackground.ToString & vbCrLf & _ "hCursor: " & .hCursor.ToString & vbCrLf & _ "hIcon: " & .hIcon.ToString & vbCrLf & _ "hIconSm: " & .hIconSm.ToString & vbCrLf & _ "hInstance: " & .hInstance.ToString & vbCrLf & _ "lpfnWndProc: " & .lpfnWndProc.ToString & vbCrLf & _ "lpszClassName: " & .lpszClassName.ToString & vbCrLf & _ "lpszMenuName: " & .lpszMenuName.ToString & vbCrLf & _ "style: " & .style.ToString) End With If UnregisterClass(WndClass.lpszClassName, WndClass.hInstance) Then MsgBox("Unregister Class Sucessfuly") Else MsgBox("Unregister Class Failed") End If End If !!!!Notes: See [WNDCLASSEX] for more details. !!!!Tips & Tricks: Please add some! !!!!Sample Code: Please add some! !!!!Alternative Managed API: Do you know one? Please contribute it! Documentation: RegisterClassEx@msdn on MSDN
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