# PointF.Subtraction 运算符

## 重载

 Subtraction(PointF, Size) 将 PointF 平移给定 Size 的负数。Translates a PointF by the negative of a given Size. Subtraction(PointF, SizeF) 按指定 PointF 的负值平移 SizeF。Translates a PointF by the negative of a specified SizeF.

## Subtraction(PointF, Size)

PointF 平移给定 Size 的负数。Translates a PointF by the negative of a given Size.

``````public:
static System::Drawing::PointF operator -(System::Drawing::PointF pt, System::Drawing::Size sz);``````
``public static System.Drawing.PointF operator - (System.Drawing.PointF pt, System.Drawing.Size sz);``
``static member ( - ) : System.Drawing.PointF * System.Drawing.Size -> System.Drawing.PointF``
``Public Shared Operator - (pt As PointF, sz As Size) As PointF``

#### 参数

pt
PointF

sz
Size

Size，它指定要从 `pt` 的坐标中减去的数。The Size that specifies the numbers to subtract from the coordinates of `pt`.

## Subtraction(PointF, SizeF)

``````public:
static System::Drawing::PointF operator -(System::Drawing::PointF pt, System::Drawing::SizeF sz);``````
``public static System.Drawing.PointF operator - (System.Drawing.PointF pt, System.Drawing.SizeF sz);``
``static member ( - ) : System.Drawing.PointF * System.Drawing.SizeF -> System.Drawing.PointF``
``Public Shared Operator - (pt As PointF, sz As SizeF) As PointF``

#### 参数

pt
PointF

sz
SizeF

SizeF，它指定要从 `pt` 的坐标中减去的数。The SizeF that specifies the numbers to subtract from the coordinates of `pt`.

### 示例

``````private void OpSubtractionExample(PaintEventArgs e)
{
PointF point1 = new PointF(120.5F, 120F);
SizeF size1 = new SizeF(20.5F, 20.5F);
PointF point2 = point1 - size1;
e.Graphics.DrawLine(Pens.Blue, point1, point2);
}
``````
``````Private Sub OpSubtractionExample(ByVal e As PaintEventArgs)
Dim point1 As New PointF(120.5F, 120F)
Dim size1 As New SizeF(120.5F, 30.5F)
Dim point2 As PointF = point1 - size1
e.Graphics.DrawLine(Pens.Blue, point1, point2)

End Sub
``````

### 注解

Subtraction 运算符从 PointF 的 x 坐标中减去指定大小的 Width，从 PointF的 y 坐标中减去 HeightThe Subtraction operator subtracts the Width of the specified size from the x-coordinate of the PointF and the Height from the y-coordinate of the PointF.