Member Avatar for sarman.boyslo

newbie wanna ask... please help

let say i have a form, in this form i make a menu, if i click it, it will show a form, mini form (sub form), in this form i put a textboxt and a button, the textboxt contain some value and changeable, if i push the button, this mini form will close and the value in it will use in the main form, how can i do this?

thanks for the help...

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  • Latest Post Latest Post by rishif2

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Generated

A simple, maintainable pattern is to treat the mini form as a modal dialog that exposes a public property (for the textbox value) and a public OK flag (or DialogResult). This keeps the main form and subform loosely coupled, avoids global state, and makes it easy to pre-fill the subform and read a final value when it closes. ’s direct control-to-control copy works but couples forms; ’s module variable works but introduces global state.

Example (VB6-style): Form2 exposes a property and sets an OK flag when its button is clicked.

' In Form2 (subform)
Public OKPressed As Boolean

Public Property Get InputValue() As String
  InputValue = txtBox.Text
End Property

Public Property Let InputValue(ByVal v As String)
  txtBox.Text = v
End Property

Private Sub cmdOK_Click()
  OKPressed = True
  Me.Hide
End Sub
' In Form1 (main form)
Dim dlg As New Form2
dlg.InputValue = txtMain.Text    ' pre-fill subform
dlg.Show vbModal
If dlg.OKPressed Then
  txtMain.Text = dlg.InputValue ' read back only if OK was used
End If
Unload dlg

For VB.NET the same idea uses ShowDialog and DialogResult; expose a public property on the dialog form and set DialogResult = DialogResult.OK from the OK button, then read the property after ShowDialog returns.

Quick troubleshooting and best practices:

  • Set the initial value via the property before showing the dialog (otherwise Form_Load in the dialog may overwrite it).
  • Hide the dialog from inside it and let the caller unload/Dispose it; this gives the caller control.
  • Prefer properties over touching another form’s controls (keeps UI encapsulated).
  • Avoid module-level globals and default-instance coupling when multiple instances or unit-testing might be needed.

This pattern fits the original question — pre-fill the subform, allow editing, then return the edited value to the main form when the subform’s OK button is used — while keeping the code clearer and safer than cross-form control assignments or global variables.

Recommended Answers

All 3 Replies

Member Avatar for AndreRet 
Form1.Text1.Text = Form2.Text1.Text

Unload Me

''Form1 is your main form, form2 is the form where you get the data from. After you have the data, close the form...
Member Avatar for sarman.boyslo

thanks for reply,

if i want the previous value appear in textboxt (in form2) after i click the menu from form 1 to show that form (form 2), and if the button clicked in form 2, the data automatically send to form 1 and form 2 will closing, how i can do that?

Member Avatar for rishif2

try this
declare public type string variable at module

Public oldstr As String

now On Sub Form (Form2)

Private Sub Command1_Click()
oldstr = Form2.Text1.Text
Form1.Text1.Text = oldstr
Unload Form2
End Sub


Private Sub Form_Load()
If oldstr <> "" Then
Form2.Text1.Text = oldstr
End If
End Sub

hope this helps you . . .

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