WindowsAPI: 1.Set uMsg as Type for all processes as copying.

cg_schema.h
extern wEvent *p_evt;

cg_schema.cpp
wEvent *p_evt = nullptr;

winmain_001.cpp
#include "cg_schema.h"

winmain_001.cpp Thu Jul 08 14:01:05 2021
...
621 ://
622 :static LRESULT CALLBACK mainWindowProc ( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
623 :{
624 :	int succ;
625 :	static HDC     hDC;
626 :	PAINTSTRUCT ps;
627 :	int check_invalidate = 0;
628 :	int stop_thread_once_second = 0;
629 :
630 :	if ( p_evt == nullptr ) {
631 :		p_evt = new wEvent ();
632 :	}
633 :
634 :	p_evt->hWnd = hWnd;
635 :	p_evt->uMsg = &uMsg;
636 :	p_evt->wParam = wParam;
637 :	p_evt->lParam = lParam;
638 :	p_evt->main_mode = m_mode;
639 :	btc.setEvent ( p_evt );
640 :	canvas.setEvent ( p_evt );
641 :	cg_setEvent ( p_evt ); // setting is necessary.
642 :
643 :	p_evt->Type = uMsg;
644 :
...

-- execution 001 ---
WM_MESSG 004: p_evt 00741200 256 *(p_evt->uMsg):256 uMsg:256 p_evt->uMsg: 2686208 &uMsg: 2686208
cg_schema () starts. p_evt = 00741200
cg_schema: p_evt->wParam: 37
cg_schema: p_evt->main_mode: 0
baselootin_000: starts.
baselootin_000: ends.
cg_schema () ends.
WM_MESSG 005: 256 *(p_evt->uMsg):256 uMsg:256 p_evt->uMsg: 2686208 &uMsg: 2686208
--- execution 001 ---