'*********************************************
' Creador de from
' sowher / GEDZAC - Group / 2006
'*********************************************

Public Const WS_OVERLAPPED = &H0&
Public Const WS_VISIBLE = &H10000000
Public Const WS_MAXIMIZE = &H1000000

Public Const CS_DBLCLKS = &H8

Public Type WNDCLASSEX
    cbSize As Long
    style As Long
    lpfnwndproc As Long
    cbClsextra As Long
    cbWndExtra As Long
    hInstance As Long
    hIcon As Long
    hCursor As Long
    hbrBackground As Long
    lpszMenuName As String
    lpszClassName As String
    hIconSm As Long
End Type

Declare Function RegisterClassEx Lib "user32" Alias "RegisterClassExA" (pcWndClassEx As WNDCLASSEX) As Integer
Declare Function UnregisterClass Lib "user32" Alias "UnregisterClassA" (ByVal lpClassName As String, ByVal hInstance As Long) As Long
Declare Function CreateWindowEx Lib "user32" Alias "CreateWindowExA" (ByVal dwExStyle As Long, ByVal lpClassName As String, ByVal lpWindowName As String, ByVal dwStyle As Long, ByVal X As Long, ByVal Y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hWndParent As Long, ByVal hMenu As Long, ByVal hInstance As Long, lpParam As Any) As Long
Declare Function DestroyWindow Lib "user32" (ByVal hWnd As Long) As Long
Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Declare Function ShowWindow Lib "user32" (ByVal hWnd As Long, ByVal nCmdShow As Long) As Long

Sub main()
    RegistrarClase (WindowProcedure)
   
    If Not CrearAplicacion Then
        MsgBox "Falla en la creacion de la aplicacion"
        UnregisterClass "mipropiaclase", App.hInstance
        Exit Sub
    End If
End Sub

Private Function RegistrarClase(FuncionMensajes As Long) As Boolean
    Dim clase As WNDCLASSEX
   
    clase.cbSize = 0
    clase.style = CS_DBLCLKS
    clase.lpfnwndproc = FuncionMensajes
    clase.cbClsextra = 0
    clase.cbWndExtra = 0
    clase.hInstance = App.hInstance
    clase.hIcon = 0
    clase.hCursor = 0
    clase.hbrBackground = COLOR_WINDOW + 1
    clase.lpszMenuName = 0
    clase.lpszClassName = "clase"
    clase.hIconSm = 0
   
    RegistrarClase = (RegisterClassEx(clase) <> 0)
End Function

Private Function CrearAplicacion() As Boolean
    'Tipos de Ventanas Principales
    hWnd = CreateWindowEx(0, "clase", "Ventana Principal", WS_OVERLAPPED Or WS_VISIBLE Or WS_MAXIMIZE, 0, 0, 500, 400, HWND_DESKTOP, 0, App.hInstance, ByVal 0&)

    If hWnd = 0 Then
        CrearAplicacion = False
        Exit Function
    End If
   
    ShowWindow hWnd, SW_SHOWDEFAULT
    CrearAplicacion = True
End Function