```powershell
param(
    [Parameter(Mandatory = $true, Position = 0)]
    [ValidateRange(0, 999)]
    [int]$Threshold
)

try {
    # Execute the command and suppress its output to ensure only our boolean is returned.
    net.exe accounts /lockoutthreshold:$Threshold | Out-Null
    
    # net.exe returns an exit code of 0 on success.
    if ($LASTEXITCODE -eq 0) {
        $true
    } else {
        $false
    }
}
catch {
    # If any exception occurs during execution, return false.
    $false
}
```