MouseMove, MouseDown and MouseUp Events

Lets check out the Command Button's MouseMove, MouseDown and MouseUp events.We will do that like we've done before, by inserting different Print commands to every event.


Copy the following code to your program:


Private Sub Command1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Print "MouseDown"
End Sub
Private Sub Command1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Print "MouseMove"
End Sub
Private Sub Command1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Print "MouseUp"
End Sub


Run the program.
Move the mouse over the form - nothing is happening.
Move the mouse over the Button - The Button's MouseMove event
is being executed every time you move the mouse over it, therefore
you see that "MouseMove" is being printed on the form
every time you move your mouse over the button.

Click on one of the mouse buttons when the mouse is over the button,
and hold the button down.
The MouseDown event is being executed.
Release the button, and the MouseUp event is being executed.

Lets check out these events parameters.

Private Sub Command1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

Each one of these events gets the same parameters:
Button, Shift, X and Y.


The Shift parameter is the same as the KeyDown
event's Shift paramater.

For example, if you'll press the Shift button while clicking
the mouse, the Shift value will be 1.


The Button parameter value is 1 if you've clicked
the left mouse button, and 2 if you've clicked the
right one.


The X and Y parameters are the X and Y coordinates of
the mouse cursor, relative to the upper left button corner.
The coordinates of the upper left button corner are (0, 0)
The coordinates of the Bottom Right button corner are (Button Width, Button Height)

You can try a little example.
Put the following line in the Command Button's MouseMove event:

Print X, Y

This line will print the X coordinate, and next to it
the Y coordinates (For example, the line:
Print "Hello", "World"    
will print:   Hello      World).