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Ask the MultiValued Visual Basic Expert - #5(as published in Spectrum magazine)updated November 17, 1997To email your questions to "Ask the MultiValued VB
Expert", click here.
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| Action | Events triggered (in order) | |
| form load | Form_Load Form_Resize Form_Activate firsttabindexcontrol_GotFocus Form_Paint |
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| form minimize | Form_Resize | |
| form restore from icon | Form_Paint (note: no Form_Resize) | |
| form maximize | Form_Resize Form_MouseMove (note: even with no mouse movement!) Form_Paint |
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| form restore from max | Form_Resize | |
| form move by drag | Form_MouseMove... | |
| form resize by drag | Form_MouseMove... Form_Resize Form_Paint Form_MouseMove... (note 2nd 'relative' move) |
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| form close | Form_QueryUnload Form_Unload |
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| click in text box | Text1_MouseMove... (only when Text1.Enabled is True) (sets Text1.SelStart BEFORE MouseDown event) Text1_MouseDown (note: before LostFocus!) prevcontrol_LostFocus Text1_GotFocus Text1_MouseUp Text1_Click |
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| single character in text box | Text1_MouseMove... Form_KeyDown (if Form.KeyPreview is True) Text1_KeyDown Form_KeyPress (if Form.KeyPreview is True) Text1_KeyPress Text1_Change Form_KeyUp (if Form.KeyPreview is True) Text1_KeyUp |
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| combo box set by listindex | Combo1_Click (note: no Change event!) | |
| single character in combo box | Combo1_GotFocus Combo1_KeyDown Combo1_KeyPress Combo1_Change Combo1_KeyUp |
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| combo box select | Combo1_DropDown (note: before GotFocus!) Combo1_GotFocus Combo1_Click (note: no Change event!) |
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| click on grid cell | Grid1_RowColChange
(note: before
GotFocus!) Grid1_MouseDown Grid1_GotFocus Grid1_SelChange Grid1_MouseUp Grid1_Click |
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| click on Command1 while in Text1 | Form_MouseMove... Command1_MouseDown (note: before LostFocus!) Text1_LostFocus Command1_GotFocus Command1_Click (note: before MouseUp!) Command1_MouseUp |
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| tab from Text1 to Text2 | Text1_LostFocus (note:
LostFocus before GotFocus) Text2_GotFocus |
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Important things to note from all this:
 | When you click on a control other than the current one,
the MouseDown event happens BEFORE the previous control's
LostFocus event, and BEFORE the new control's GotFocus
event. One valuable use of this is that you can detect
the user clicking the Cancel button and programatically
avoid running data validation in the LostFocus event of
whatever field they were in before clicking Cancel. |
| The Click event for a Command button happens BEFORE the
MouseUp event, while for most other controls, it happens
AFTER the MouseUp event. |
| A number of controls have events that happen BEFORE the
GotFocus event. For example, you can build or adjust the
list of a ComboBox in the DropDown event before GotFocus.
In the Grid control, you get a RowColChange event before
the GotFocus event. |
| When you click in a TextBox, the SelStart property is set (based on the position of the mouse) before ANY other event takes place. |
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Copyright © 2006 intellact
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