Win32 Message Loop
Interactive visualization of the Win32 message queue and event loop. Trace how window messages flow from hardware input through the OS queue to the application's WndProc callback.
By Mohamed Habib Jaouadi•November 1, 2025•
Post Related
#windows-gui
#win32
#message-loop
#system-programming
#windows-internals
Win32 Message Loop Simulator
Visualize how Windows processes messages through GetMessage, TranslateMessage, and DispatchMessage.
Processed: 0
Message Queue
Click Start to begin
Message Loop
GetMessageW(&msg, ...)Retrieve from queue
↓
TranslateMessage(&msg)VK → WM_CHAR
↓
DispatchMessageW(&msg)Send to WindowProc
WindowProc
Waiting for message...
WM_PAINT
WM_KEYDOWN
WM_MOUSEMOVE
WM_LBUTTONDOWN