Microsoft KB Archive/133452

= How to Use Macro Substitution in Object Referencing =

Article ID: 133452

Article Last Modified on 2/15/2000

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APPLIES TO


 * Microsoft Visual FoxPro 3.0 Standard Edition

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This article was previously published under Q133452



SUMMARY
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
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

Keywords: KB133452

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