Delphi Define Directive
Physician's Directive Define
Jun 6, 2017 - Compiler directive: $IfDef. Compiler directives are special syntax comments we can use to control the features of the Delphi compiler. Delphi defines several standard conditional symbols. In the 'code' above, if the DefName is defined the code above $Else gets compiled. Delphi in a Nutshell by Ray Lischner Stay ahead with the world's most comprehensive technology and business learning platform. With Safari, you learn the way you learn best. I am trying to use the DEFINE directive in my application in order to decide if the application in demo mode or not. King of fighters 97 download free. So on my application main form OnShow event I check if the application is in demo mode or not based on a var inside the registry. Now I need to know how I can set the directive based on the var I will check in the registry?
Other answers have pointed you at the places to define symbols and the scope implications of the different approaches. However, what no-one has yet mentioned is that if you change the DEFINE symbols you MUST do a FULL BUILD of your project for them to have any effect on your code. When you 'Compile' the Delphi compiler will only compile units which have themselves changed since the previous compile. If you change DEFINE symbols this doesn't change any project units, so if the units are not re-compiled then the change in DEFINE symbols will not have ANY effect in those units.