Working with windows  programming [GUI programming] :-

1. working with from and controls is called as GUI programming.
2. Windows programming supports to develop disk top applications , games, animations, Rich interactive, applications etc,…………
3. Form works like a container, where any number of controls can be placed.
4. Form is also called as WIN FORM (Windows form)
5. Every Form is a class which must be inherited from a predefined class called as FROM.

Class Test : Form

{

}

Test form name

Formpredefined class

Example :

Developing a user defined from at run time.

open windows forms application project

place a button

code in GD

Class Test : Form

Code for Button 1_ click

Test t = new Test ();

1. Back color = color. Green;
2. show ();

Every Form will be associated with three files

Working with FORM properties :-  (F4)

1. Name: - this property changes object names with controls and class name with Forms
2. Back color : Back ground color changes
3. Fore color :-
4. Font:-
5. Back ground Image
6. Back ground Image Layout
7. Opacity (transparent) : when this value is decreasing then transparency ratio will be increasing  (2……………..100)
8. Transparency key :- this value must be same as form back color.

Then except form border and controls body remaining port will be displayed fully transparent.

9. Form border style : none
10. Window state : normal / Minimize / Maximize

Developing a Screen Saver :-

Generally Screen saves are  .SCR files ,  which will be under  c:/windows/system 32 folder

Open windows forms application project with project name Abcd  (output file will be abcd. exe)

Form properties  (F4) and set

Back color = black

Form border style  = none.

Window state = maximize

• Place a picture Box control  propertiesimage = select an Image
• Place a timer control àproperties  enabled = true
• Code in GD. Int x = 0;
• Code for Timer 1_Tick

{

X = x +5;

If (x > 400)

X = 0;

Picture box 1. Location = new point (x, x);

}

• Code for Form 1 key press event ( Form 1 àproperties àclick on yellow colored Icon (events)àdouble click on key press )

{

Application .Exit ();

}

Execute the Project (F5)

OBS:-

Abcd .exe file will be created under

D:/c 194/abcd/bin/debug Folder

Rename Abcd .exe with Abcs.Scr

copy Abcd .Scr in to C :/windows / system 32 folder;

Then check box desktop propertiesScreen saver

Form Properties continuation:-

Context menu Strip :

• The Associated context menu strip control will be displayed when right clicked on an object.

Example on context menu strip :-

Display an Icon in Systems  along with context menu strip.

• Open windows forms application project
• Place a color – dialog control
• Place a context menu strip control on the form
• Design context menu strip with following options

• • Code for colors menu Item ( double click on colors)

  {

  Color Dialog 1. Show Dialog ();

  this. Back color = color Diaglog1. Color;

  }

   

  • Code for Exit menu Item

  {

  Application .Exit ();

  }

   

  • Place a notify I con control à properties à I con = select icon file
  • Context menu strip = context menu strip 1 à name of the control.

   

   

   

  Execute the project (F5)

  Then observe system’s tray for a new icon

Form properties Continuation

2. Accept button : the Associated button will be executed when pressed “Enter key”
3. Cancel Button : the associated button will be executed when pressed “Escape key”

Example:-

àOpen windows forms Application project

àPlace five text boxes and two buttons

• Code for button 1 _ click

{

This. Back color = color .Green ;

}

à  code for button2_ click (clearing the text boxes)

{

For each (control c in this. controls)

{

If (c. Get type (). Name == “Text box”)

1. text = “”;

}

• Choose from properties

Accept Button = Button 1

Cancel Button = Button 2