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64-Bit Custom Actions

On 64-bit operating systems, Windows Installer may call custom actions that have been compiled for 32-bit or 64-bit systems.

A 64-bit custom action based on Scripts must be explicitly marked as a 64-bit custom action by adding the msidbCustomActionType64BitScript bit to the custom actions numeric type in the Type column of the CustomAction table.

ConstantHexadecimalDecimalMeaning
msidbCustomActionType64BitScript0x00010004096This is a 64-bit custom action written in Scripts.

 

Custom actions based on Executable files or Dynamic-Link Libraries that have been complied for a 64-bit operating systems do not require including this additional bit in the Type column of the CustomAction table.

 

 

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