VB. Net class library (advanced version - 1)

Whether it's vb still VB.net, No real dll

.net Written dll Only in .net Use

So let's create one VB.net Dynamic link library ,net Free choice of version , remember , It must be .net Of

Entry project , quote “system.Drawing”, You don't need to download it yourself

 

write in

Imports System.Drawing

Public Class Main
    Protected Image As Bitmap
    Protected g As Graphics
    ''' <summary>
    '''  Call the function alone , Only perform the create task ; If you need to get pictures , Will return a picture (bitmap)
    ''' </summary>
    ''' <param name="bmpsize"> New picture size (size)</param>
    ''' <param name="backColor"> New picture background color (color)</param>
    ''' <returns></returns>
    Public Function Creatbmp(bmpsize As Size, backColor As Color)
        Image = New Bitmap(bmpsize.Width, bmpsize.Height)
        g = Graphics.FromImage(Image)
        g.Clear(backColor)
        Return Image
    End Function

End Class

Did you learn .netGDI I can understand everything , But writing it yourself is more profound

Build a small project in the solution ： Used to call a function , The name is called. test（ whatever ）

Pull one button,picturebox

Add... To the main class ：

Be careful , there GDI_Make_NET4_5.Main yes The namespace of the class library .Main class

 Public GDI As New GDI_Make_NET4_5.Main

button Join in ：（ Parameters can be changed at will ）

 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Pic.Image = GDI.Creatbmp(New Drawing.Size(200, 200), Color.FromArgb(255, 0, 0))
    End Sub

Primary stage ：

  It just provides a convenient and simple call , It can also be convenient for others to use ……