NSIS 判断特定程式是否已安装(How to check and install MySQL .NET Connector)

资料来源: https://nsis.sourceforge.io/Mysql_connector

   ; check MYSQL Connector 5.0.3
   IfFileExists "${PROGRAMFILES}\MySQL\MySQL Connector Net 5.0.3\*.*" mysqlfound
       Return
   
   mysqlfound:
       File MySql.Data.msi
       ExecWait "$TEMP\MySql.Data.msi /quiet"