VB6 Tutorial 64: The Screen Object
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One of the objects you can work with in VB6 is the Screen object. This will allow you to find information about the current screen configuration, which will in turn allow you to position your forms and other output in the correct position on the users screen, regardless of the current resolution or dpi settings.
You have come across many controls throughout this tutorial. All the controls i.e CommandButton, Label, TextBox are objects. Besides the form is also an object.
A Collection is an object. If you need a refresher on collections, check out the lesson about collections
Some more examples are Clipboard, Dictionary object, Drive and folder objects, App object, and printer object. There are many. The Screen object is also an object like them.
What is Screen Object?
The one line answer: The screen object corresponds to the visible desktop.
While working with the form's properties, you have set Left, Top, Height and Width properties with a numeric value. Do you know the unit in which they are expressed? They are in twips.
On the printer, 1 inch = 1,440 twips.
Converting twips values into pixels
You can easily convert twips values into pixels using the TwipsPerPixelX and TwipsPerPixelY properties of the screen object.
Your computer screen's resolution:
sWidth = Screen.Width / Screen.TwipsPerPixelX sHeight = Screen.Height / Screen.TwipsPerPixelY MsgBox "Resolution is " & sWidth & " X " & sHeight
This will get you the result in pixels.
Properties to know
Have a look at some more properties of the Screen Object.
The MouseIcon property sets a custom mouse icon.
The MousePointer property
Changes the mouse pointer. But it applies to the current application only.
Screen.MousePointer = vbCross
FontCount and Font properties
The FontCount property gives you the number of fonts for the current display device, and the Fonts property returns the font names.
The following program shows the font names.
Dim i As Integer For i = 0 To Screen.FontCount - 1 Print Screen.Fonts(i) Next i
The ActiveForm property
This property returns the form that is the active window.
The ActiveControl property
Returns the control that has the focus.
Text1.SetFocus Screen.ActiveForm.Caption = "New Form" Screen.ActiveControl.Text = "New text"
The ActiveForm and ActiveControl properties also only applies to the current application.
All the properties except MouseIcon and MousePointer are read-only properties here.
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