Programación General > Visual Basic 6.0 e inferiores
Armando Formularios Transparentes.
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L3andro:
Hola muchach@s, bueno este es mi primer post aqui en Solo Codigo, llegue hasta aqui por recomendacion de unos amigos que al ver que quiero introducirme un poco mas en ASM e ir aprendiendo me recomendaron este sitio. Para que mi primer post no sean preguntas quiero colaborar con esto quizas a alguien le sea de utilidad.
A continuación veremos como podemos armar un formulario "invisible", esto podria tener varias utilidades pero eso ya dependera de la que ustedes quieran darle, por ejemplo podriamos dejar un text o un command volando, asi que bueno comenzemos.
--- Código: Text --- Option Explicit'Declaraciones de los diferentes tipos de regiones a crearPrivate Declare Function CreateRectRgn Lib "gdi32" (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As LongPrivate Declare Function CreateEllipticRgn Lib "gdi32" (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As LongPrivate Declare Function CreateRoundRectRgn Lib "gdi32" (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long, ByVal X3 As Long, ByVal Y3 As Long) As LongPrivate Declare Function CreatePolygonRgn Lib "gdi32" (lpPoint As POINTAPI, ByVal nCount As Long, ByVal nPolyFillMode As Long) As Long'POINTAPI tipo requerido para CreatePolygonRgnPrivate Type POINTAPI X As Long Y As LongEnd Type'Fija la regionPrivate Declare Function SetWindowRgn Lib "user32" (ByVal hwnd As Long, ByVal hRgn As Long, ByVal bRedraw As Boolean) As Long'Combina la regionPrivate Declare Function CombineRgn Lib "gdi32" (ByVal hDestRgn As Long, ByVal hSrcRgn1 As Long, ByVal hSrcRgn2 As Long, ByVal nCombineMode As Long) As Long'Tipo de combinacionConst RGN_XOR = 3'----------------------------------------------------------------------------------------------------Public Sub MakeTransparent(TransForm As Form)Dim ErrorTest As Double 'en caso de que haya un error, se ignora On Error Resume Next Dim Regn As Long Dim TmpRegn As Long Dim TmpControl As Control Dim LinePoints(4) As POINTAPI 'Puesto que las API trabajan en pixels, cambiamos el modo de escala a pixels TransForm.ScaleMode = 3 'Debe ejecutarse sobre un formulario son bordes. If TransForm.BorderStyle <> 0 Then MsgBox "Cambia el borderstyle a 0!", vbCritical, "ACK!": End 'Hace todo invisible Regn = CreateRectRgn(0, 0, 0, 0) 'Un bucle para controlar cada control en el formulario For Each TmpControl In TransForm 'Si el control es una linea... If TypeOf TmpControl Is Line Then 'Comprueba la inclinacion If Abs((TmpControl.Y1 - TmpControl.Y2) / (TmpControl.X1 - TmpControl.X2)) > 1 Then 'Si es mas vertical que horizontal entonces.. 'Fija los puntos LinePoints(0).X = TmpControl.X1 - 1 LinePoints(0).Y = TmpControl.Y1 LinePoints(1).X = TmpControl.X2 - 1 LinePoints(1).Y = TmpControl.Y2 LinePoints(2).X = TmpControl.X2 + 1 LinePoints(2).Y = TmpControl.Y2 LinePoints(3).X = TmpControl.X1 + 1 LinePoints(3).Y = TmpControl.Y1 Else 'Si es mas horizontal que vertical, entonces... 'Fija los puntos LinePoints(0).X = TmpControl.X1 LinePoints(0).Y = TmpControl.Y1 - 1 LinePoints(1).X = TmpControl.X2 LinePoints(1).Y = TmpControl.Y2 - 1 LinePoints(2).X = TmpControl.X2 LinePoints(2).Y = TmpControl.Y2 + 1 LinePoints(3).X = TmpControl.X1 LinePoints(3).Y = TmpControl.Y1 + 1 End If 'Crea el nuevo poligono con los puntos TmpRegn = CreatePolygonRgn(LinePoints(0), 4, 1) 'Si el control es una figura... ElseIf TypeOf TmpControl Is Shape Then 'si es asi, comprobamos el tipo If TmpControl.Shape = 0 Then 'Es un rectangulo TmpRegn = CreateRectRgn(TmpControl.Left, TmpControl.Top, TmpControl.Left + TmpControl.Width, TmpControl.Top + TmpControl.Height) ElseIf TmpControl.Shape = 1 Then 'Es un cuadrado If TmpControl.Width < TmpControl.Height Then TmpRegn = CreateRectRgn(TmpControl.Left, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2, TmpControl.Left + TmpControl.Width, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width) Else TmpRegn = CreateRectRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2, TmpControl.Top, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height, TmpControl.Top + TmpControl.Height) End If ElseIf TmpControl.Shape = 2 Then 'Es un ovalo TmpRegn = CreateEllipticRgn(TmpControl.Left, TmpControl.Top, TmpControl.Left + TmpControl.Width + 0.5, TmpControl.Top + TmpControl.Height + 0.5) ElseIf TmpControl.Shape = 3 Then 'Es un circulo If TmpControl.Width < TmpControl.Height Then TmpRegn = CreateEllipticRgn(TmpControl.Left, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2, TmpControl.Left + TmpControl.Width + 0.5, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width + 0.5) Else TmpRegn = CreateEllipticRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2, TmpControl.Top, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height + 0.5, TmpControl.Top + TmpControl.Height + 0.5) End If ElseIf TmpControl.Shape = 4 Then 'Es un rectangulo redondeado If TmpControl.Width > TmpControl.Height Then TmpRegn = CreateRoundRectRgn(TmpControl.Left, TmpControl.Top, TmpControl.Left + TmpControl.Width + 1, TmpControl.Top + TmpControl.Height + 1, TmpControl.Height / 4, TmpControl.Height / 4) Else TmpRegn = CreateRoundRectRgn(TmpControl.Left, TmpControl.Top, TmpControl.Left + TmpControl.Width + 1, TmpControl.Top + TmpControl.Height + 1, TmpControl.Width / 4, TmpControl.Width / 4) End If ElseIf TmpControl.Shape = 5 Then 'Es un cuadrado redondeado If TmpControl.Width > TmpControl.Height Then TmpRegn = CreateRoundRectRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2, TmpControl.Top, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height + 1, TmpControl.Top + TmpControl.Height + 1, TmpControl.Height / 4, TmpControl.Height / 4) Else TmpRegn = CreateRoundRectRgn(TmpControl.Left, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2, TmpControl.Left + TmpControl.Width + 1, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width + 1, TmpControl.Width / 4, TmpControl.Width / 4) End If End If 'Si el control es una figura con fondo transparente If TmpControl.BackStyle = 0 Then 'Combinamos la region en memoria y creamos una nueva CombineRgn Regn, Regn, TmpRegn, RGN_XOR If TmpControl.Shape = 0 Then 'Rectangulo TmpRegn = CreateRectRgn(TmpControl.Left + 1, TmpControl.Top + 1, TmpControl.Left + TmpControl.Width - 1, TmpControl.Top + TmpControl.Height - 1) ElseIf TmpControl.Shape = 1 Then 'Cuadrado If TmpControl.Width < TmpControl.Height Then TmpRegn = CreateRectRgn(TmpControl.Left + 1, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + 1, TmpControl.Left + TmpControl.Width - 1, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width - 1) Else TmpRegn = CreateRectRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + 1, TmpControl.Top + 1, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height - 1, TmpControl.Top + TmpControl.Height - 1) End If ElseIf TmpControl.Shape = 2 Then 'Ovalo TmpRegn = CreateEllipticRgn(TmpControl.Left + 1, TmpControl.Top + 1, TmpControl.Left + TmpControl.Width - 0.5, TmpControl.Top + TmpControl.Height - 0.5) ElseIf TmpControl.Shape = 3 Then 'Circulo If TmpControl.Width < TmpControl.Height Then TmpRegn = CreateEllipticRgn(TmpControl.Left + 1, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + 1, TmpControl.Left + TmpControl.Width - 0.5, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width - 0.5) Else TmpRegn = CreateEllipticRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + 1, TmpControl.Top + 1, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height - 0.5, TmpControl.Top + TmpControl.Height - 0.5) End If ElseIf TmpControl.Shape = 4 Then 'Rectangulo redondeado If TmpControl.Width > TmpControl.Height Then TmpRegn = CreateRoundRectRgn(TmpControl.Left + 1, TmpControl.Top + 1, TmpControl.Left + TmpControl.Width, TmpControl.Top + TmpControl.Height, TmpControl.Height / 4, TmpControl.Height / 4) Else TmpRegn = CreateRoundRectRgn(TmpControl.Left + 1, TmpControl.Top + 1, TmpControl.Left + TmpControl.Width, TmpControl.Top + TmpControl.Height, TmpControl.Width / 4, TmpControl.Width / 4) End If ElseIf TmpControl.Shape = 5 Then 'Cuadrado redondeado If TmpControl.Width > TmpControl.Height Then TmpRegn = CreateRoundRectRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + 1, TmpControl.Top + 1, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height, TmpControl.Top + TmpControl.Height, TmpControl.Height / 4, TmpControl.Height / 4) Else TmpRegn = CreateRoundRectRgn(TmpControl.Left + 1, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + 1, TmpControl.Left + TmpControl.Width, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width, TmpControl.Width / 4, TmpControl.Width / 4) End If End If End If Else 'Crea una region rectangular con estos parametros TmpRegn = CreateRectRgn(TmpControl.Left, TmpControl.Top, TmpControl.Left + TmpControl.Width, TmpControl.Top + TmpControl.Height) End If 'Comprueba que el control tiene ancho o conseguiremos extraños resultados ErrorTest = 0 ErrorTest = TmpControl.Width If ErrorTest <> 0 Or TypeOf TmpControl Is Line Then 'Combina las regiones CombineRgn Regn, Regn, TmpRegn, RGN_XOR End If Next TmpControl 'Crea las regiones SetWindowRgn TransForm.hwnd, Regn, True End Sub
Bueno todo corresponde a las declaraciones del form, y deben tener en cuenta que el "Option Explicit" va primero si lo queremos incluir en otras declaraciones.
Ahora, para hacer el formulario transparente, basta que en el form_load coloquemos: --> MakeTransparent Me
Bueno con eso basta tendremos un buen efecto en nuestros formularios de suspencion de los objetos y textos.
Saludos y espero que a alguien le sea de utilidad ;)
L3andro.
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