PrintSink

PrintSink is a packaged Windows virtual printer built on the Print Support App v4 surface. It is a modern software printer: no legacy driver, no port monitor, and no INF.

The app installs PrintSink queues for PDF, XPS/OXPS, PostScript, cloud/custom routing, PWG Raster, and PCLm. The foreground app is WinUI 3 with Microsoft.UI.Reactor. Background print activations run through CsWinRT components, while the shared routing and validation logic lives in PrintSink.Core.

Requirements

• Windows 11 24H2, build 26100 or later.
• .NET SDK 10, pinned by global.json.
• Visual Studio 2026 with Windows App SDK and single-project MSIX tooling.
• MSBuild on PATH for Visual Studio-style builds.

Build

Build the full solution:

.\build.ps1

Run tests:

.\test.ps1 -Configuration Debug -Platform x64 -NoBuild
.\test-app.ps1 -Configuration Debug -Platform x64 -NoBuild

dotnet build is useful for managed checks. The full solution uses MSBuild because PrintSink.Xps is a C++/WinRT project.

Run the packaged app from the project profile:

dotnet run --project src\PrintSink.App

Run the CLI:

dotnet run --project src\PrintSink.Cli -- --help

For unattended print-stack checks, the packaged alias can skip foreground Job UI:

printsink-app.exe --disable-job-ui
printsink-app.exe --enable-job-ui

More detail lives in docs/BUILD.md and docs/TESTING.md.