WinAPI-Fun

A collection of (relatively) harmless prank / virus examples using the Windows API

Pre-built binaries can be found in the Releases section

To reset most examples, re-launch and kill the program again

File	Description
avoid.nim	The start button avoids mouse clicks by jumping around on the taskbar
bsod.nim	Triggers a Blue Screen of Death
dripper.nim	Moves the current window down slightly every 10 seconds
highcontrast.nim	Enable high contrast mode system-wide
intercept_space.nim	Replaces space bar keypress with the word "space"
mouse_button_swap.nim	Swaps the left and right mouse buttons
mouse_cursor.nim	Changes the mouse cursor to a finger via a full transparent window
mouse_invert.nim	Inverts mouse movement on the x and y axes
mouse_trails.nim	Creates a trail of mouse icons behind the cursor as it moves
mouse_stop.nim	Creates a stop sign that follows the mouse cursor and blocks clicks
mouse_trap.nim	Traps the mouse cursor in the top right corner for 60 seconds
random_capslock.nim	Randomly toggle the Caps Lock every 0-30 seconds
random_close.nim	Randomly closes the current focussed window every 0-30 seconds
rotate.nim	Rotates the display 180 degrees
shake.nim	Rapidly shakes the current focussed window
start_disable.nim	Disables clicking the start button or taskbar
start_popup.nim	Opens the start menu popup randomly every 0-60 seconds
stop_shutdown.nim	Temporarily prevents a shutdown with a custom message
time_local.nim	Adds the message "HI" to the AM/PM localization string system-wide

Compilation

Install Nim and the Winim library, then compile with the --app:gui flag

Note: if cross-compiling from Linux or macOS, also install the mingw toolchain and use the -d:mingw flag

sh
nim c -d:mingw --app:gui src/avoid.nim