Windows Forms - Page 3

Show a form with an explosion effect. the numSteps parameter is the number of steps to increase the form size from 0 to the original size the stepDuration argument is the number of milliseconds between each step Example: Private Sub Form1_Activated(...) Handles MyBase.Activated

Force a TextBox control to accept only numeric digits Cancel the effect by passing Force = False Note that it only accepts positive integer values

Hiding a form with an implosion effect. the numSteps parameter is the number of steps to decrease the form size from the current size to 0 the stepDuration argument is the number of milliseconds between each step Example: Private Sub Form1_Closing(...) Handles MyBase.Closing

Moves an item of a listbox to another index If FROMINDEX = -1 then it moves the current highlighted item Example: move up the selected item MoveListboxItem(ListBox1, -1, ListBox1.SelectedIndex - 1) move down the selected item MoveListboxItem(ListBox1, -1, ListBox1.SelectedIndex + 1)

Return the number of checked nodes in the specified tree

To add an image as an embedded resource in a Windows Forms application, add the image file to the project with Project | Add Existing Item. Then select the file in the Solution Explorer, go to the Properties Window, and set its Build Action property to Embedded Resource. At ...

In VB6 there was no easy way to create multiline tooltips for form controls, you necessarily had to resort to API tricks. And it was probably just not worth the effort. The good news is that doing this is straightforward in VB.NET! First add a Tooltip Provider control on the form to add the ...

Being an avid Access Programmer I have been frustrated with the limitation of VB DropDownLists to using only 1 field as the value. I found a way to simulate/work around this behavior with concatenation of several database fields at the query level to be my columns(i.e. Select KeyId1 + '~' + ...

The .NET framework includes a ByteViewer control, that you can use on your own forms to display data stored in a Byte array or in a file. The ByteViewer control can't be added to the control Toolbox, though, so you must instantiate it through code only. ' IMPORTANT: this code requires ...

select a treevide node and ensure it is visible by expanding all its parent nodes and bringing the node in the visible portion of the control

Binding a DataGrid - or any other data-aware control - to a DataSet or a DataTable at runtime isn't difficult: you just have to assign the DataTable to the DataGrid's DataSource property, as in: ' DS is the DataSet variable DataGrid1.DataSource = ds.Tables("Titles")

In VB6 and previous version, displaying an enumerated value in a group of option buttons is quite simple, provided that the option buttons be grouped in a control array. VB.NET doesn't support control arrays, so you can't reuse the same simple coding techniques. However, you can prepare a ...

This class does the owner drawing of a MenuItem to draw a color box. The class inherits from MenuItem, thus the ColorMenuItem objects can be added to a parent MenuItem or a context menu as you normally do, and can also be mixed with other MenuItem items under the same parent item.

Not all fonts support the same styles. This function takes in input a font family and a font style, and returns a font style which is safe for that particular font family, by removing the styles that are not supported Example: GetSafeStyleForFontFamily(richTextBox1.SelectionFont.

Sometimes you may need to hide or show some pages of a TabControl according to the information you want to show, basing on the currently logged-in user for example (users with low privileges won't be able to get all the information or to change records). To do this, you may attempt to add or ...

When you resize a ListView control (this happens automatically if the ListView is docked to the form, and the user resizes the form), it's nice to have the last column to be resized accordingly to cover the available space. To do this, handle the ListView's Resize control (in .NET any control ...

Add a style to the selection of a RichTextBox, without deleting the current styles that may be already present in the selection or in portions of it Example: AddFontStyle(richTextBox1, FontStyle.Bold)

Copy the RichTextBox's selected text into the Clipboard Example: CopyFromRichTextBox (richTextBox1)

Paste the text currently in the Clipboard into the specified RichTextBox Example: PasteIntoRichTextBox (richTextBox1)

Set the specified font size to the selection of a RichTextBox Example: SetFontSize(richTextBox1, 16)