I have a PowerShell script cmdlet that supports the -WhatIf & -Confirm parameters.
It does this by calling the $PSCmdlet.Should
Updated per @manojlds comment
Cast $WhatIf and $Confirm to Boolean and pass the values to the the underlying cmdlet:
function Stop-CompanyXyzServices
{
[CmdletBinding(SupportsShouldProcess=$true,ConfirmImpact='High')]
Param(
[Parameter(
Position=0,
ValueFromPipeline=$true,
ValueFromPipelineByPropertyName=$true
)]
[string]$Name
)
process
{
if($PSCmdlet.ShouldProcess($env:COMPUTERNAME,"Stop service '$Name'"))
{
Stop-Service $name -WhatIf:([bool]$WhatIf) -Confirm:([bool]$confirm)
}
}
}