NSIS import powershell script with parameters

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PowerShell

NSIS

I have written a sample program that will write Hello World and created NSIS file and executed which works fine for me

!include "x64.nsh"  
  
Name "nsExec Test"  
OutFile "nsExecTest.exe"  
#ShowInstDetails show  
  
Section "Output to variable"  
nsExec::ExecToStack 'powershell.exe "& "Import-Module C:\PowerShell\Hello.ps1"'  
Pop $0  
Pop $1  
DetailPrint '"ImportModules" printed: $1'  
SectionEnd

Which is printing the write host as per written when I executed it. My code in .ps1 file

# Filename: Hello.psm1  
Write-Host  
Write-Host 'Hello World!'  
Write-Host "Good-bye World! `n"  
# end of script 

Now I am trying to achieve the same with parameters, can some one help me

# Filename: Hello.ps1  
function TestParam([string] $TestParam)  
{  
    Write-Host  
    Write-Host '$TestParam'  
    Write-Host "Good-bye $TestParam! `n"  
}  
# end of script  

What I have tried:

nsExec::ExecWait  "powershell -File C:\Dorababu\PowerShell\testparam1.ps1 -param1 'Hello'"