Creating Winforms Custom Controls

MicrosoftOfficial

Creates custom controls and UserControls for modern WinForms (.NET 6+). Use when deriving from Control, UserControl, Button, TextBox, or other base controls, implementing custom rendering with OnPaint overrides, creating composite controls with child control composition, adding custom properties with [Browsable], [Category], or [DefaultValue] attributes for Designer support, implementing…

Install

npx skills add microsoft/upgrade-agent-plugins --skill creating-winforms-custom-controls

npx skills add microsoft/upgrade-agent-plugins --skill creating-winforms-custom-controls -a claude-code -g

npx skills add microsoft/upgrade-agent-plugins --skill creating-winforms-custom-controls -a codex -g

gemini skills install https://github.com/microsoft/upgrade-agent-plugins.git --path plugins/upgrade-agent/upgrade/dotnet/skills/lazy/desktop/winforms/creating-winforms-custom-controls

gh skill install microsoft/upgrade-agent-plugins creating-winforms-custom-controls

git clone --depth 1 https://github.com/microsoft/upgrade-agent-plugins /tmp/microsoft__upgrade-agent-plugins
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/desktop/winforms/creating-winforms-custom-controls ~/.claude/skills/creating-winforms-custom-controls   # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/desktop/winforms/creating-winforms-custom-controls ~/.agents/skills/creating-winforms-custom-controls   # Codex, Cursor, Gemini CLI, Copilot, OpenCode

Install

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