MyPrintHelper

A simple utility for testing and interacting with monochrome and color printers, designed for use in a service center environment.

Screenshots

Main Interface	FRPO Command GUI
Printer List & Test Pages	Send Commands
Test Grids	Test Rainbow

Features

• Find Printers: Discovers and lists all online printers connected to the system (ignores FAX and XPS devices).
• Print B/W Grid: Prints a full A4 page with a black and white grid pattern to test toner/ink coverage and alignment.
• Print Rainbow: Prints a 600x600 rainbow gradient to test color printing capabilities.
• Print Test Rectangle: Send a 720x1000 pixel rectangle (CMYK or RGB) to the printer, covering almost a full A4 page.
• FRPO/PJL Commands: A dedicated GUI allows sending Prescribe (FRPO) commands to compatible printers (e.g., Kyocera). You can send custom commands, load commands from a script file, or choose from a list of integrated commands. (PJL script support is theoretical and not yet tested).

How It Works

• The application uses standard Windows printing APIs to communicate with printers.
• It filters out virtual devices like "Microsoft XPS Document Writer" and "Microsoft Print to PDF" to show only physical printers.
• The test page generation is done programmatically to create the specific patterns.

Known Issues

• Some HP printers may still appear in the list even when powered off, as they remain in the system with Local = True and WorkOffline = true flags.

Building from Source

This is a C# .NET Framework project. You can open the PrinterHelper.sln file in Visual Studio and build the solution.