Microsoft Installer MSI HasRelatedProduct Macro

Author: Zinthose (talk, contrib)

About

Short and simple macro to extend LogicLib to allow for testing the system for MSI packages that are installed with the same UpgradeCode as provided.

Example

    ##   This example uses the MsiEnumRelatedProducts MSI API call to determine
    ##    if an msi package on the same upgrade track as the provided GUID is 
    ##    installed. 
    ${If} ${MSI_HasRelatedProduct} `{D8968392-698B-4A41-B6AD-C25C6608A69B}`
        DetailPrint "A product is installed on the same track."
    ${Else}
        DetailPrint "No product track is installed matching the the supplied GUID."
    ${EndIf}

Macro

!include "LogicLib.nsh"
!define MSI_HasRelatedProduct `"" MSI_HasRelatedProduct`
!macro _MSI_HasRelatedProduct _a _b _t _f
    !insertmacro _LOGICLIB_TEMP
    System::Call `Msi::MsiEnumRelatedProducts(&t39 '${_b}',i 0,i 0,&t39 n)i .s`
    Pop $_LOGICLIB_TEMP
    !insertmacro _== $_LOGICLIB_TEMP 0 `${_t}` `${_f}`
!macroend

Issues

• Only tested on XP x86
• Requires Microsoft Installer to be previously installed. If it isn't then it's likely that no MSI packages are installed anyway  ;-)