Table of Contents

Namespace VisioForge.Core.UI.WinForms.Dialogs

Namespaces

VisioForge.Core.UI.WinForms.Dialogs.OutputFormats
VisioForge.Core.UI.WinForms.Dialogs.VideoEffects

Classes

GlobalKeyboardHook

Provides system-wide keyboard hook functionality using Windows Low-Level Keyboard Hook API. Enables monitoring of global keyboard events across all applications with optional key filtering. This class implements a low-level keyboard hook that captures keyboard events before they reach the target application.

GlobalKeyboardHookEventArgs

Provides event data for global keyboard hook events. Contains detailed information about a keyboard event captured by the GlobalKeyboardHook, including the key data, state, and modifier key information.

LogDialog

A Windows Forms dialog for displaying error messages and log entries. This dialog is shown when the OnError event is not implemented in client code, providing a default error display mechanism for the VisioForge media framework.

WindowCaptureForm

A specialized WinForms dialog for interactively selecting and capturing application windows.

This borderless, semi-transparent form provides a visual interface for selecting windows to capture by hovering over them with the mouse cursor. When activated via a global hotkey, it displays a camera crosshair overlay and allows users to click on any window to capture its handle and properties. The selected window can then be used as a capture source for screen recording or streaming applications.

Key features:

  • Global hotkey activation (default: Ctrl+Shift+Q)
  • Semi-transparent camera icon cursor overlay
  • Real-time window information display
  • Parent window capture support
  • Configurable border color for selection feedback
  • Mouse drag repositioning capability
  • Non-intrusive fuchsia transparency key

Architecture:

  • Borderless form with transparency for overlay effect
  • Global keyboard hook for hotkey detection
  • Real-time cursor position tracking
  • Win32 API integration for window enumeration

Usage workflow:

  1. Form is created and positioned
  2. User presses configured hotkey (Ctrl+Shift+Q)
  3. OnCaptureHotkey event fires
  4. User moves cursor over target window
  5. InfoLabel displays window information
  6. User clicks to capture window handle
  7. CapturedWindowHandle and CapturedWindowText properties are set

Threading: All operations should occur on the UI thread. Global keyboard hook events are marshaled appropriately.

Structs

GlobalKeyboardHook.LowLevelKeyboardInputEvent

Represents low-level keyboard input event data from the Windows KBDLLHOOKSTRUCT structure. Contains detailed information about a keyboard event captured by the low-level keyboard hook.

Enums

GlobalKeyboardHook.KeyboardState

Represents the different states of keyboard events that can be captured by the hook. These values correspond to Windows keyboard message identifiers.