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Tip of the Day
Language: Visual Basic
Expertise: Intermediate
Aug 20, 1997

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


Use ByVal When API Calls Cause Problems

If an API call is not achieving the desired or expected effects, try placing ByVal in front of parameters. Likely ones to cause trouble are strings and anything declared "As Any." The APIs that trip people up the most are the various INI file calls, SendMessage, and HMemCpy. Be very suspicious any time a parameter is declared As Any rather than as an explicit type, or if a string isn't declared ByVal.
Karl E.
 
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