Shape.HitTest Method

Gets information about a line or shape control at the specified position on the screen.

Namespace:  Microsoft.VisualBasic.PowerPacks
Assembly:  Microsoft.VisualBasic.PowerPacks.Vs (in Microsoft.VisualBasic.PowerPacks.Vs.dll)

Syntax

'宣告
Public MustOverride Function HitTest ( _
    x As Integer, _
    y As Integer _
) As Boolean

public abstract bool HitTest(
    int x,
    int y
)

public:
virtual bool HitTest(
    int x, 
    int y
) abstract

abstract HitTest : 
        x:int * 
        y:int -> bool 

public abstract function HitTest(
    x : int, 
    y : int
) : boolean

Parameters

• x
  Type: System.Int32
  The horizontal screen coordinate.

• y
  Type: System.Int32
  The vertical screen coordinate.

Return Value

Type: System.Boolean
true if the line or shape control is located at the specified coordinates; otherwise, false.

Remarks

The x and y parameters represent the current mouse coordinates relative to the screen, not relative to the control's container.

Examples

The following example demonstrates how to use the HitTest method of the LineShape control to determine whether the pointer is positioned over the control when the SPACEBAR is pressed.

Private Sub LineHitTestForm_PreviewKeyDown(
    ByVal sender As Object, 
    ByVal e As System.Windows.Forms.PreviewKeyDownEventArgs
  ) Handles Me.PreviewKeyDown

    If e.KeyCode = Keys.Space Then
        Dim px As Integer
        Dim py As Integer
        Dim hit As Boolean
        px = LineHitTestForm.MousePosition.X
        py = LineHitTestForm.MousePosition.Y
        hit = LineShape1.HitTest(px, py)
        MsgBox(CStr(hit))
    End If
End Sub

private void LineHitTestForm_PreviewKeyDown(object sender, 
    System.Windows.Forms.PreviewKeyDownEventArgs e)
{
    if (e.KeyCode == Keys.Space)
    {
        int px;
        int py;
        bool hit;
        string result;
        px = LineHitTestForm.MousePosition.X;
        py = LineHitTestForm.MousePosition.Y;
        hit = lineShape1.HitTest(px, py);
        result = hit.ToString();
        MessageBox.Show(result);
    }
}

.NET Framework Security

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

See Also

Reference

Shape Class

Microsoft.VisualBasic.PowerPacks Namespace

Other Resources

How to: Draw Lines with the LineShape Control (Visual Studio)

How to: Draw Shapes with the OvalShape and RectangleShape Controls (Visual Studio)

Introduction to the Line and Shape Controls (Visual Studio)