How to Create a Resolution Independent Frame in VB.NET
- 1). Right-click anywhere on your desktop and select "Properties." Go the the "Settings" tab and change the screen resolution to "800 x 600." You will use this small resolution to create the resolution-independent frame.
- 2). Open Visual Studio and start a new project. The "Form1" form is created automatically.
- 3). Go to the form's module and paste the code to make the form resolution-independent:
Option Explicit
Dim MyForm As FRMSIZE
Dim DesignX As Integer
Dim DesignY As Integer
Private Sub Form_Load()
Dim ScaleFactorX As Single, ScaleFactorY As Single ' Scaling factors
' Size of Form in Pixels at design resolution
DesignX = 800
DesignY = 600
RePosForm = True ' Flag for positioning Form
DoResize = False ' Flag for Resize Event
' Set up the screen values
Xtwips = Screen.TwipsPerPixelX
Ytwips = Screen.TwipsPerPixelY
Ypixels = Screen.Height / Ytwips ' Y Pixel Resolution
Xpixels = Screen.Width / Xtwips ' X Pixel Resolution
' Determine scaling factors
ScaleFactorX = (Xpixels / DesignX)
ScaleFactorY = (Ypixels / DesignY)
ScaleMode = 1 ' twips
'Exit Sub ' uncomment to see how Form1 looks without resizing
Resize_For_Resolution ScaleFactorX, ScaleFactorY, Me
Label1.Caption = "Current resolution is " & Str$(Xpixels) + _
" by " + Str$(Ypixels)
MyForm.Height = Me.Height ' Remember the current size
MyForm.Width = Me.Width
End Sub
Private Sub Form_Resize()
Dim ScaleFactorX As Single, ScaleFactorY As Single
If Not DoResize Then ' To avoid infinite loop
DoResize = True
Exit Sub
End If
RePosForm = False
ScaleFactorX = Me.Width / MyForm.Width ' How much change?
ScaleFactorY = Me.Height / MyForm.Height
Resize_For_Resolution ScaleFactorX, ScaleFactorY, Me
MyForm.Height = Me.Height ' Remember the current size
MyForm.Width = Me.Width
End Sub
Private Sub Command1_Click()
Dim ScaleFactorX As Single, ScaleFactorY As Single
DesignX = Xpixels
DesignY = Ypixels
RePosForm = True
DoResize = False
' Set up the screen values
Xtwips = Screen.TwipsPerPixelX
Ytwips = Screen.TwipsPerPixelY
Ypixels = Screen.Height / Ytwips ' Y Pixel Resolution
Xpixels = Screen.Width / Xtwips ' X Pixel Resolution
' Determine scaling factors
ScaleFactorX = (Xpixels / DesignX)
ScaleFactorY = (Ypixels / DesignY)
Resize_For_Resolution ScaleFactorX, ScaleFactorY, Me
Label1.Caption = "Current resolution is " & Str$(Xpixels) + _
" by " + Str$(Ypixels)
MyForm.Height = Me.Height ' Remember the current size
MyForm.Width = Me.Width
End Sub - 4). Add all the controls you want to test to the form. You can add labels, command buttons and picture boxes. You must do this to test if all elements on your form adjust their size correctly.
- 5). Go to the "Project" menu and select "Add Module...." Click "Add" to add the new module to your project.
- 6). Go to the new module and paste the code to automatically adjust the proportions of your form in relation to screen resolution:
Public Xtwips As Integer, Ytwips As Integer
Public Xpixels As Integer, Ypixels As Integer
Type FRMSIZE
Height As Long
Width As Long
End Type
Public RePosForm As Boolean
Public DoResize As Boolean
Sub Resize_For_Resolution(ByVal SFX As Single, _
ByVal SFY As Single, MyForm As Form)
Dim I As Integer
Dim SFFont As Single
SFFont = (SFX + SFY) / 2 ' average scale
' Size the Controls for the new resolution
On Error Resume Next ' for read-only or nonexistent properties
With MyForm
For I = 0 To .Count - 1
If TypeOf .Controls(I) Is ComboBox Then ' cannot change Height
.Controls(I).Left = .Controls(I).Left * SFX
.Controls(I).Top = .Controls(I).Top * SFY
.Controls(I).Width = .Controls(I).Width * SFX
Else
.Controls(I).Move .Controls(I).Left * SFX, _
.Controls(I).Top * SFY, _
.Controls(I).Width * SFX, _
.Controls(I).Height * SFY
End If
' Resize and reposition before changing the FontSize
.Controls(I).FontSize = .Controls(I).FontSize * SFFont
Next I
If RePosForm Then
' Now size the Form
.Move .Left * SFX, .Top * SFY, .Width * SFX, .Height * SFY
End If
End With
End Sub - 7). Test your new form by running it under different screen resolutions. It should take up the same desktop area and maintain its position.
Source...