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The
SendKeys command in Visual Basic for Applications allows you to
simulate the pressing of keys while a macro is running. By using the
correct combination of keystrokes, you can accomplish many tasks that are
not possible through normal macro commands.
For example, if you need a subroutine to display the
About Microsoft
Excel dialog box, you can use the following command:
In this example, "%h" is equivalent to pressing ALT+H, which starts the
Help menu. The "a" is equivalent to selecting the
About Microsoft Excel menu item.
You can change the paper source used by a printer driver in Windows 95 or later by using commands similar to the following:
'Use ONE of the following four lines of code to determine the paper
'source. If a different letter is required, set the value of xSource
'accordingly.
xSource = "a" 'Auto Select
xSource = "u" 'Upper Tray
xSource = "m" 'Manual Feed
xSource = "l" 'Lower Tray
'This line of code actually changes the paper source.
SendKeys "%fu%o%s" & xSource & "~~"
In the
SendKeys command, the following actions are executed:
Action Equivalent to
-----------------------------------------------------
%f ALT+F. Selects the File menu.
u Chooses Page Setup.
%o ALT+O. Selects the Options button.
%s ALT+S. Selects the Paper Source list box.
~~ Presses ENTER twice to accept the changes.
The xSource variable contains a letter that determines what paper source
is used. Depending on the value that you use (usually "a," "u," "m," or "l"), the
SendKeys statement selects the appropriate paper source, and then simulates two presses of the ENTER key to accept the changes.
If you know that you will always be switching to a particular paper source, you do not have to use the xSource variable. For example, the following command always switches to the
Manual Feed paper source setting: