# Control.PointToScreen(Point) Método

## Definição

Calcula o local do ponto do cliente especificado em coordenadas de tela.Computes the location of the specified client point into screen coordinates.

``````public:
System::Drawing::Point PointToScreen(System::Drawing::Point p);``````
``public System.Drawing.Point PointToScreen (System.Drawing.Point p);``
``member this.PointToScreen : System.Drawing.Point -> System.Drawing.Point``
``Public Function PointToScreen (p As Point) As Point``

#### Parâmetros

p
Point

O Point da coordenada do cliente a ser convertida.The client coordinate Point to convert.

#### Retornos

Point

Um Point que representa o Point convertido, `p`, em coordenadas de tela.A Point that represents the converted Point, `p`, in screen coordinates.

## Exemplos

O exemplo de código a seguir demonstra como usar os membros BackColor, RectangleToScreen, PointToScreen, MouseButtons, ControlPaint.DrawReversibleFramee Rectangle.IntersectsWith.The following code example demonstrates how to use the BackColor, RectangleToScreen, PointToScreen, MouseButtons, ControlPaint.DrawReversibleFrame, and Rectangle.IntersectsWith members. Para executar o exemplo, Cole o código a seguir em um formulário chamado Form1 contendo vários controles.To run the example, paste the following code in a form called Form1 containing several controls. Este exemplo requer que os eventos MouseDown, MouseMovee MouseUp estejam conectados aos manipuladores de eventos definidos no exemplo.This example requires that the MouseDown, MouseMove, and MouseUp events are connected to the event handlers defined in the example.

``````private:
// The following three methods will draw a rectangle and allow
// the user to use the mouse to resize the rectangle.  If the
// rectangle intersects a control's client rectangle, the
// control's color will change.
bool isDrag;
Rectangle theRectangle;
Point startPoint;
void Form1_MouseDown( Object^ sender, System::Windows::Forms::MouseEventArgs^ e )
{

// Set the isDrag variable to true and get the starting point
// by using the PointToScreen method to convert form
// coordinates to screen coordinates.
if ( e->Button == ::MouseButtons::Left )
{
isDrag = true;
}

Control^ control = dynamic_cast<Control^>(sender);

// Calculate the startPoint by using the PointToScreen
// method.
startPoint = control->PointToScreen( Point(e->X,e->Y) );
}

void Form1_MouseMove( Object^ /*sender*/, System::Windows::Forms::MouseEventArgs^ e )
{

// If the mouse is being dragged,
// undraw and redraw the rectangle as the mouse moves.
if ( isDrag )
{
ControlPaint::DrawReversibleFrame( theRectangle, this->BackColor, FrameStyle::Dashed );

// Calculate the endpoint and dimensions for the new
// rectangle, again using the PointToScreen method.
Point endPoint = this->PointToScreen( Point(e->X,e->Y) );
int width = endPoint.X - startPoint.X;
int height = endPoint.Y - startPoint.Y;
theRectangle = Rectangle(startPoint.X,startPoint.Y,width,height);

// Draw the new rectangle by calling DrawReversibleFrame
// again.
ControlPaint::DrawReversibleFrame( theRectangle, this->BackColor, FrameStyle::Dashed );
}
}

void Form1_MouseUp( Object^ /*sender*/, System::Windows::Forms::MouseEventArgs^ /*e*/ )
{

// If the MouseUp event occurs, the user is not dragging.
isDrag = false;

// Draw the rectangle to be evaluated. Set a dashed frame style
// using the FrameStyle enumeration.
ControlPaint::DrawReversibleFrame( theRectangle, this->BackColor, FrameStyle::Dashed );

// Find out which controls intersect the rectangle and
// change their color. The method uses the RectangleToScreen
// method to convert the Control's client coordinates
// to screen coordinates.
Rectangle controlRectangle;
for ( int i = 0; i < Controls->Count; i++ )
{
controlRectangle = Controls[ i ]->RectangleToScreen( Controls[ i ]->ClientRectangle );
if ( controlRectangle.IntersectsWith( theRectangle ) )
{
Controls[ i ]->BackColor = Color::BurlyWood;
}

}

// Reset the rectangle.
theRectangle = Rectangle(0,0,0,0);
}
``````
``````// The following three methods will draw a rectangle and allow
// the user to use the mouse to resize the rectangle.  If the
// rectangle intersects a control's client rectangle, the
// control's color will change.

bool isDrag = false;
Rectangle theRectangle = new Rectangle(new Point(0, 0), new Size(0, 0));
Point startPoint;

private void Form1_MouseDown(object sender,
System.Windows.Forms.MouseEventArgs e)
{

// Set the isDrag variable to true and get the starting point
// by using the PointToScreen method to convert form
// coordinates to screen coordinates.
if (e.Button==MouseButtons.Left)
{
isDrag = true;
}

Control control = (Control) sender;

// Calculate the startPoint by using the PointToScreen
// method.
startPoint = control.PointToScreen(new Point(e.X, e.Y));
}

private void Form1_MouseMove(object sender,
System.Windows.Forms.MouseEventArgs e)
{

// If the mouse is being dragged,
// undraw and redraw the rectangle as the mouse moves.
if (isDrag)

// Hide the previous rectangle by calling the
// DrawReversibleFrame method with the same parameters.
{
ControlPaint.DrawReversibleFrame(theRectangle,
this.BackColor, FrameStyle.Dashed);

// Calculate the endpoint and dimensions for the new
// rectangle, again using the PointToScreen method.
Point endPoint = ((Control) sender).PointToScreen(new Point(e.X, e.Y));

int width = endPoint.X-startPoint.X;
int height = endPoint.Y-startPoint.Y;
theRectangle = new Rectangle(startPoint.X,
startPoint.Y, width, height);

// Draw the new rectangle by calling DrawReversibleFrame
// again.
ControlPaint.DrawReversibleFrame(theRectangle,
this.BackColor, FrameStyle.Dashed);
}
}

private void Form1_MouseUp(object sender,
System.Windows.Forms.MouseEventArgs e)
{
// If the MouseUp event occurs, the user is not dragging.
isDrag = false;

// Draw the rectangle to be evaluated. Set a dashed frame style
// using the FrameStyle enumeration.
ControlPaint.DrawReversibleFrame(theRectangle,
this.BackColor, FrameStyle.Dashed);

// Find out which controls intersect the rectangle and
// change their color. The method uses the RectangleToScreen
// method to convert the Control's client coordinates
// to screen coordinates.
Rectangle controlRectangle;
for(int i = 0; i < Controls.Count; i++)
{
controlRectangle = Controls[i].RectangleToScreen
(Controls[i].ClientRectangle);
if (controlRectangle.IntersectsWith(theRectangle))
{
Controls[i].BackColor = Color.BurlyWood;
}
}

// Reset the rectangle.
theRectangle = new Rectangle(0, 0, 0, 0);
}
``````
``````' The following three methods will draw a rectangle and allow
' the user to use the mouse to resize the rectangle.  If the
' rectangle intersects a control's client rectangle, the
' control's color will change.

Dim isDrag As Boolean = False
Dim theRectangle As New rectangle(New Point(0, 0), New Size(0, 0))
Dim startPoint As Point

Private Sub Form1_MouseDown(ByVal sender As Object, ByVal e As _
System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseDown

' Set the isDrag variable to true and get the starting point
' by using the PointToScreen method to convert form coordinates to
' screen coordinates.
If (e.Button = MouseButtons.Left) Then
isDrag = True
End If

Dim control As Control = CType(sender, Control)

' Calculate the startPoint by using the PointToScreen
' method.
startPoint = control.PointToScreen(New Point(e.X, e.Y))
End Sub

Private Sub Form1_MouseMove(ByVal sender As Object, ByVal e As _
System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseMove

' If the mouse is being dragged, undraw and redraw the rectangle
' as the mouse moves.
If (isDrag) Then

' Hide the previous rectangle by calling the DrawReversibleFrame
' method with the same parameters.
ControlPaint.DrawReversibleFrame(theRectangle, Me.BackColor, _
FrameStyle.Dashed)

' Calculate the endpoint and dimensions for the new rectangle,
' again using the PointToScreen method.
Dim endPoint As Point = CType(sender, Control).PointToScreen(New Point(e.X, e.Y))
Dim width As Integer = endPoint.X - startPoint.X
Dim height As Integer = endPoint.Y - startPoint.Y
theRectangle = New Rectangle(startPoint.X, startPoint.Y, _
width, height)

' Draw the new rectangle by calling DrawReversibleFrame again.
ControlPaint.DrawReversibleFrame(theRectangle, Me.BackColor, _
FrameStyle.Dashed)
End If
End Sub

Private Sub Form1_MouseUp(ByVal sender As Object, ByVal e As _
System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseUp

' If the MouseUp event occurs, the user is not dragging.
isDrag = False

' Draw the rectangle to be evaluated. Set a dashed frame style
' using the FrameStyle enumeration.
ControlPaint.DrawReversibleFrame(theRectangle, Me.BackColor, _
FrameStyle.Dashed)

' Find out which controls intersect the rectangle and change their color.
' The method uses the RectangleToScreen method to convert the
' Control's client coordinates to screen coordinates.
Dim i As Integer
Dim controlRectangle As Rectangle
For i = 0 To Controls.Count - 1
controlRectangle = Controls(i).RectangleToScreen _
(Controls(i).ClientRectangle)
If controlRectangle.IntersectsWith(theRectangle) Then
Controls(i).BackColor = Color.BurlyWood
End If
Next

' Reset the rectangle.
theRectangle = New Rectangle(0, 0, 0, 0)
End Sub
``````