Copy Screenshot To Clipboard Windows [hot] Review

Note: CF_PNG is not a standard clipboard format but is registered by Windows as "PNG" (CF_PNG = 49797). Modern applications like Microsoft Office and Paint prioritize PNG when available. Developers can interact with screenshot-to-clipboard functionality using the Win32 API. Below is a minimal C++ example to programmatically copy a screenshot of the primary monitor to the clipboard.

| Format Identifier | Description | Advantages | |------------------|-------------|------------| | CF_BITMAP | Handle to a bitmap (HBITMAP) | Fast, compatible with all legacy apps | | CF_DIB | Device-independent bitmap structure | Preserves color depth and resolution | | CF_DIBV5 | Enhanced DIB with alpha channel | Supports transparency (Windows 2000+) | | CF_PNG | Portable Network Graphics (custom format) | Smaller size, preserves alpha | copy screenshot to clipboard windows

OpenClipboard(NULL); EmptyClipboard(); SetClipboardData(CF_BITMAP, hBitmap); CloseClipboard(); Note: CF_PNG is not a standard clipboard format

DeleteDC(hdcMem); ReleaseDC(NULL, hdcScreen); Below is a minimal C++ example to programmatically

| Shortcut | Scope | Data Format | Introduced | |----------|-------|-------------|-------------| | | Full screen | Bitmap (CF_BITMAP) | Windows 1.0 | | Alt + PrtScn | Active window only | Bitmap (CF_BITMAP) | Windows 95 | | Win + Shift + S | Selected region | PNG + Bitmap | Windows 10 (1809) | 2.1 Legacy Shortcuts (PrtScn and Alt+PrtScn) When the user presses PrtScn , Windows captures the entire virtual screen (all monitors) and stores it as a device-independent bitmap (DIB) in the clipboard under the CF_BITMAP format. The shortcut Alt+PrtScn captures only the currently active foreground window, excluding the title bar’s shadow if present. These shortcuts do not provide visual feedback or editing capabilities. 2.2 Modern Shortcut (Win+Shift+S) Introduced with the Snipping Tool & Snip & Sketch overhaul, Win+Shift+S launches the modern snipping bar, allowing rectangular, freeform, window, or full-screen snips. Upon selection, the captured image is written to the clipboard in both uncompressed bitmap and PNG formats. A system toast notification confirms the action, and the user can optionally annotate before copying. 3. Clipboard Data Formats for Images The Windows clipboard supports multiple image formats simultaneously. When a screenshot is copied, applications can retrieve the most suitable format.

| Method | Steps | Time (sec) | Context switches | |--------|-------|------------|------------------| | Save as file → attach | 5 | 18.4 | 4 | | | 2 | 7.2 | 1 |

int width = GetSystemMetrics(SM_CXSCREEN); int height = GetSystemMetrics(SM_CYSCREEN);