Controls

There are two differences between the controls and the Office ActiveX controls
1) windows form controls are implemented by extensible managed classes. Office controls are unmanaged
2) windows form controls have no concept of their location in relation to the containing workbook or document
You can use this.Controls collection to enumerate through all the controls


ControlPrefixComments
BackgroundWorker Allows the user to to execute an operation on a separate (dedicated) thread.
ButtonbtnAllows the user to run a separate subroutine.
CheckBoxchbAllows the user to either select or deselect an option.
CheckedListBoxchlbAllows the user to select multiple items from a list of items.
ColorDialog (Common Control)
ComboBoxcboAllows the user to either select an item from a drop-down box or enter a different item.
DataGridViewdgrAllows the user to display (and edit) a table of information.
DateTimePickerdtpAllows the user to select a specific date and/or time.
DHTML Editing ControldhtAllows the user to display a web page (not supported).
FolderBrowseDialogfol(Common Control) Allows the user to browse, create and select folders (not files).
FontDialog (Common Control)
Frame = Panel  
GroupBoxgrpAllows you to group other controls together.
HScrollBarhsbAllows the user to drag a button in order to select a value.
Image = PictureBox  
ImageListimgAllows you to have a repository of images in your assembly.
LabellblAllows you to display text to the user.
LinkLabelllbAllows you to include hyperlinks in your text.
ListBoxlsbAllows the user to select an item from a list of items.
ListViewlsvAllows the user to select a single (or multiple) items from a list with multiple columns.
MenuStripmspAllows the user to group commands by a common theme.
NumericUpDownnupAllows the user to display numeric values.
OpenFileDialog (Common Control)
OptionButton = RadioButton  
PageSetupDialog (Common Control)
PanelpnlAllows the user an area for grouping controls and scrolling.
PictureBoxpic(Image) Allows you to display a graphic or picture.
ProgressBarprgAllows the user to indicate progress using a graphical bar.
PrintDialog (Common Control)
PrintPreviewDialog (Common Control)
RadioButtonrad(OptionButton) Allows the user to select from a list of possible distinct options.
RefEditref 
RichTextBoxrchAllows the user to display text with formatting.
SaveFileDialog (Common Control)
SplitContainersplAllows you to split an area into two resizeable panels.
Splitter  
SplitterPanel  
StatusStripstsAllows you to add a status bar to your window.
TabControltabAllows you to display multiple tabs of the same controls.
TableLayoutPaneltlp 
TextBoxtxt(EditBox) Allows you to display text and to allow the user to enter information.
ToolTiptipAllows you to display text when you hover over other controls.
ToolStriptlsRepresents a panel in a StatusStrip control.
ToolStripButtontlsbRepresents a selectable item for a ToolStrip control.
ToolStripButtontlsm 
TreeViewtvwAllows you to display a hierarchy of nodes with parents and child.
UserControlucl 
VScrollBarvsbAllows the user to drag a button in order to select a value.
WebBrowserwbrAllows the user to include a web browser on a form.

(View > Tab Order)


If you set the Font property on a form, prior to adding any controls then all the controls will inherit the font style for the form
You can select all the controls using (Ctrl + "A")
You can lock the controls (Format > Lock Controls). This prevents any of the controls on the form being accidently moved.
(Format > Align)
Aligning controls is made a lot easier by having the grid on the form
The alignments and sizing options



Timer

This is an invisible stopwatch that gives you access to the system clock.
It can be used to count down from a preset time to cause a delay in a program or to repeat an action at prescribed intervals.
Although timer objects ate not visible at runtime, each timer is associated with an event procedure that runs every time the timer's preset interval has elapsed.




ActiveX Controls

You can easily expand the collection of controls that you have access to by loading ActiveX or COM controls.
When you add an ActiveX control to your Toolbox, Visual Studio displays them with the .NET controls and you can use them on your forms with few limitations. Visual Studio must create a wrapper for the control to enable it to be used in a .NET program.


Me.tabMyTabControl.Controls.Find(key:="mytag", SearchAllChildren=True) 


bitmaps
icons


The System.Drawing namespace include numerous classes for creating graphics

LineDrawLine
RectangleDrawRectangle
ArcDrawArc
Circle / EllipseDrawEllipse
PolygonDrawPolygon
CurveDrawCurve
BeziersplinesDrawBezier


Overloading Handlers

Private Sub Control_OnEvent() Handles Control1.OnEvent, Control2.OnEvent 


What is a Custom Control ?

no user interface



Setting Focus


txtTextBox.Select() 

KB - 822493


Me.ActiveControl = Me.txtMyTextbox 
Me.txtMyTextbox.Focus




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