message boxes in powershell

ShowMessage.ps1

<# types
"ok",
"error",
"warning",
"question",
"info",
"okcancel",
"abortretryignore",
"yesnocancel",
"yesno",
"retrycancel",
"canceltryagaincontinue"
#>
<# buttons
0: OK
1: OK Cancel
2: Abort Retry Ignore
3: Yes No Cancel
4: Yes No
5: Retry Cancel
#>
# Example Usage:
# ShowMessage "Test Message" "My Title" "yesnocancel"
function ShowMessage($msg, $caption="Notice", $type="info", $buttons=-1)
{
    $wshell=New-Object -comObject Wscript.Shell               
    $typeInt = 0
    switch($buttons)
    {
                    0 { $type = "ok" }
                    1 { $type = "okcancel" }
                    2 { $type = "abortretryignore" }
                    3 { $type = "yesnocancel" }
                    4 { $type = "yesno" }
                    5 { $type = "retrycancel" }
    }
    switch($type)
    {
                    "error" {$typeInt = 16}                 # 'Stop'
                    "warning" {$typeInt = 48}               # 'Exclamation'
                    "question" {$typeInt = 32}              # 'Question'
                    "info" {$typeInt = 64}                  # 'Information'
                    "ok" {$typeInt = 0}                     # 'Ok'
                    "okcancel" {$typeInt = 1}               # 'Ok Cancel'
                    "abortretryignore" {$typeInt = 2}       # 'Abort Retry Ignore'
                    "yesnocancel" {$typeInt = 3}            # 'Yes No Cancel'
                    "yesno" {$typeInt = 4}                  # 'Yes No'
                    "retrycancel" {$typeInt = 5}            # 'Retry Cancel'
                    "canceltryagaincontinue" {$typeInt = 6} # 'Cancel Try-Again Continue'
                    default {$icon = 0}                     # 'No icon'
    }
    
    # 0 for the second parameter (duration) here means to stay up until closed (i.e. 'infinite' duration)
    $answer = $wshell.Popup($msg,0,$caption, $typeInt)
    
    $returnValue = ""
    switch($answer)
    {
                    1 { $returnValue = "ok" }
                    2 { $returnValue = "cancel" }
                    3 { $returnValue = "abort" }
                    4 { $returnValue = "retry" }
                    5 { $returnValue = "ignore" }
                    6 { $returnValue = "yes" }
                    7 { $returnValue = "no" }
                    10 { $returnValue = "tryagain" }
    }
                
    return $returnValue
}