Create a non-rectangular form

Frm_main.cs

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 1   Using System;
 2   Using System. Collections. Generic;
 3   Using System. componentmodel;
 4   Using System. Data;
 5   Using System. drawing;
 6  Using System. text;
 7   Using System. Windows. forms;
 8   Using System. runtime. interopservices;
 9  
 10   Namespace Rectangleform
 11 {
 12       Public   Partial   Class Frm_main: Form
 13 {
 14 Bitmap bit; //  Declare a Bitmap bitmap object  
  15           Public Frm_main ()
 16 {
 17 Initializecomponent ();
 18 }
 19  
 20          Private   Void Form1_load ( Object Sender, eventargs E)
 21 {
 22 Bit = New Bitmap ( "  Bccd.png  " ); //  Initializes a bitmap object from a specified image.  
  23 Bit. maketransparent (color. Blue );//  Use the default transparent color to make the Bitmap bitmap transparent  
  24 }
 25           Protected   Override   Void Onpaint (painteventargs E)
 26 {
 27 E. Graphics. drawimage (image) bit, New Point ( 0 , 0 ));//  Draw an image on a form  
  28 }
 29  
 30           Private   Void Labelease click ( Object Sender, eventargs E)
 31 {
 32               This . Close (); //  Close form 
  33 }
 34 }
 35 }

Frm_main.designer.cs

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 1   Namespace Rectangleform
 2 {
 3       Partial   Class Frm_main
 4 {
5           ///   <Summary>  
  6   ///  Required designer variables.
  7   ///   </Summary>  
  8           Private System. componentmodel. icontainer components = Null ;
 9  
10           ///   <Summary>  
  11   ///  Clear all resources in use.
  12   ///   </Summary>  
  13   ///   <Param name = "disposing">  If the managed resources should be released, the value is true; otherwise, the value is false.  </Param> 
  14           Protected   Override   Void Dispose ( Bool Disposing)
 15 {
 16               If (Disposing & (components! = Null ))
 17 {
 18 Components. Dispose ();
19 }
 20               Base . Dispose (disposing );
 21 }
 22  
 23           # Region The Code 
 24  
 25           ///   <Summary>  
  26  ///  Required methods supported by the designer-do not
  27   ///  Use the code editor to modify the content of this method.
  28   ///   </Summary>  
  29           Private   Void Initializecomponent ()
 30 {
 31               This . Label1 =New System. Windows. Forms. Label ();
 32               This . Suspendlayout ();
 33               //   
  34   //  Label1
  35   //   
  36               This . Label1.backcolor = system. Drawing. color. transparent;
37               This . Label1.location = New System. Drawing. Point ( 280 , 42 );
 38               This . Label1.name = "  Label1  " ;
 39               This . Label1.size = New System. Drawing. Size (17 , 16 );
 40               This . Label1.tabindex = 0 ;
 41               This . Label1.click + = New System. eventhandler ( This . Labelease click );
 42               //   
  43   // Frm_main
  44   //   
  45               This . Autoscaledimensions = New System. Drawing. sizef (6f, 12f );
 46               This . Autoscalemode = system. Windows. Forms. autoscalemode. Font;
 47               This . Backcolor = system. Drawing. systemcolors. Control;
 48               This . Clientsize = New System. Drawing. Size ( 300 , 300 );
 49               This . Controls. Add ( This . Label1 );
 50               This . Formborderstyle = system. Windows. Forms. formborderstyle. None;
 51               This . Name = "  Frm_main " ;
 52               This . Startposition = system. Windows. Forms. formstartposition. centerscreen;
 53               This . Text = "  Create a non-rectangular form  " ;
 54               This . Transparencykey = system. Drawing. systemcolors. Control;
 55               This . Load + =New System. eventhandler ( This . Form1_load );
 56               This . Resumelayout ( False );
 57  
 58 }
 59  
 60           # Endregion 
 61  
 62           Private System. Windows. Forms. Label label1;
 63  
 64 }
 65 }