ReadRegStr and user variables

I'm trying to do the following:

ReadRegStr $2 HKLM $R4 $R7

It doesn't work, but if replace R4 and R7 with their values, then it does. I've double-checked for typos, and haven't found any. What am I doing wrong?

Thanks!

maybe you need to quote variables.

Should Work

The following worked for me using NSIS 2.0b under Windows 98 SE.

;--------------------------

# [Global Pseudo-constants]

;--------------------------

  !Define TrialName       "ReadRegTest"



;------------------

# [.exe Attributes]

;------------------



  Name "${TrialName}"

  OutFile "${TrialName}.exe"

  Caption ""

  Subcaption 3 ": Trial"

  ShowInstDetails show



;------

Section

;------

  StrCpy $R4 ".MP3"

  StrCpy $R7 "Content Type"

  ReadRegStr $2 HKCR $R4 $R7

  DetailPrint $2

SectionEnd ; ================================

Output in the listbox is: audio/mid
NOTE: It worked OK even without enclosing $R7 in quotes.
Are you getting a compile error or just no output?
Are you sure the ValueName you're trying to read exists in the registry?

I finally found out my problem: there was a newline at the end of one of the vars! I thought the messagebox I used to debug automatically made a new line because of space constraints, not because it was in one of the vars! Oh well, live and learn 🙂