Article: Q133452
Product(s): Microsoft FoxPro
Version(s): WINDOWS:3.0
Operating System(s):
Keyword(s):
Last Modified: 15-FEB-2000
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The information in this article applies to:
- Microsoft Visual FoxPro for Windows, version 3.0
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SUMMARY
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Macro substitution treats the contents of a memory variable or array element as
a character string literal. When an ampersand (&) precedes a Character-type
memory variable or array element, the contents of the variable or element
replace the macro reference. You can use macro substitution in any command or
function that accepts a character string literal.
MORE INFORMATION
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In the Language Reference, page 8, the (&) Ampersand command is explained.
One area of amplification to the Macro Substitution command is the .cExpression,
which allows for a continuation of the command.
Here is an example showing how objects can be referenced using macro
substitution:
frmForm = CREATEOBJECT("Form")
frmForm.SHOW
X="frmForm"
cMemvarIs="Visible"
&X.&cMemvarIs =.F. && Nothing happens due to improper syntax
&X..&cMemvarIs=.F. && The form should disappear
WAIT WINDOW "Form should have disappeared."
madd="AddObject"
&X..Visible=.T. && The form should reappear
&X..&madd("cmdMyButton2","cmdMyButton")
myb="cmdMyButton2"
&X..&myb..&mvis=.t.
READ EVENTS
DEFINE CLASS cmdMyButton AS CommandButton
PROCEDURE Click
ThisForm.RELEASE
CLEAR EVENTS
ENDPROC
ENDDEFINE
Additional query words: VFoxWin
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Keywords :
Technology : kbVFPsearch kbAudDeveloper kbVFP300
Version : WINDOWS:3.0
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