3d: Part of Solutions:

Part of Solutions:

1. Kill an InvalidateRect: in mainWindowProc.
2. Kill any other InvalidateRect.

When you Keyup in mainWindowProc only, we can refresh(*1) a screen.

(*1)
refresh = InvalidateRect

Next of Solutions:

1. Call the simple drawing function like Circle.
inside "void wKickEventDisplayThreeD::kickPaintEvent"

At least, we could have problem under the above function.

static LRESULT CALLBACK mainWindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
	...
    switch ( uMsg ){
    case WM_PAINT:
        // event.hDc = BeginPaint( hWnd, &ps);
        // wmpaint_display_threeD_proc ( hWnd, &hDC, &ps, uMsg, wParam, lParam );
        // btc.Process ();
        printf("WM_PAINT 005: %d *(p_evt->uMsg):%d uMsg: %d \r\n", uMsg, *(p_evt->uMsg), uMsg );
        EndPaint(hWnd, &ps);
        printf("WM_PAINT 006: %d *(p_evt->uMsg):%d uMsg: %d \r\n", uMsg, *(p_evt->uMsg), uMsg );
        break;
    case WM_KEYUP:
        InvalidateRect( hWnd, NULL, TRUE);
        break;
    case WM_CHAR: // ADD: 20200612:
        //InvalidateRect(hWnd, NULL, TRUE);
        break;

    }

file: clibboard.cpp
int Paste(HWND hwnd, char *str) {
	printf("Now we do not use Paste:\r\n");
	exit(-1);

	return ReadClip( hwnd, str );
}

void draw_box(HWND hWnd, HDC hDC, PAINTSTRUCT* ps, UINT uMsg, WPARAM wParam, LPARAM lParam) {

	if (curtain == nullptr) return;

	for ( int i=0; i<12; i++ ) {
//		GamePaint_011( hDC, to_screen_line( curtain->box->line[i] ) ); // already created:
		GamePaint_011(hDC, to_screen_line(curtain->box->line[i], curtain->box->line_on_screen[i])); // already created:
	}
}

void create_panel_onrails_002 (HWND hWnd, HDC hDC, PAINTSTRUCT* ps, UINT uMsg, WPARAM wParam, LPARAM lParam) {
	vLine* line = nullptr;
	vLine* line_1 = nullptr;
	vLine* line_2 = nullptr;
	vLine* line_4 = nullptr;

	printf("void create_panel_onrails_002 (HWND hWnd, HDC hDC, PAINTSTRUCT* ps, UINT uMsg, WPARAM wParam, LPARAM lParam) starts.");
	// Nove the below to initialization:
	static POINT points[4];
	//ADD: 20191231
	for (int i = 0; i < CurveLines->curve_points_num - 2; i += 2) {
		line = new vLine();
		line_1 = new vLine();
		line->setLine(CurveLines->curve_points[i], CurveLines_Support->curve_points[i]);
		line = (vLine*)to_screen_line(line, line_1);
		line->print();

		line_2 = new vLine();
		line_4 = new vLine();
		line_2->setLine(CurveLines->curve_points[i + 1], CurveLines_Support->curve_points[i + 1]);
		line_2 = (vLine*)to_screen_line(line_2, line_4);
		line_2->print();

		points[0] = { (int)line_1->p1->x, (int)line_1->p1->y };
		points[1] = { (int)line_1->p2->x, (int)line_1->p2->y };
		points[2] = { (int)line_4->p2->x, (int)line_4->p2->y };
		points[3] = { (int)line_4->p1->x, (int)line_4->p1->y };

		GamePaint_012(hDC, (POINT*)points, 4);
		printf("draw i: %d is painted\r\n", i);
	}
	//ADD: 20191231
	printf("void create_panel_onrails_002 (HWND hWnd, HDC hDC, PAINTSTRUCT* ps, UINT uMsg, WPARAM wParam, LPARAM lParam) ends.");
}

// customized from GamePaint_009
//
//
//
//
void GamePaint_011(HDC hDC, vLine* line ) {

	int scale_2 = 30;
	static RECT rect_2, rect;

	if (paintedFlag == 0) return;

	printf("GamePaint_011: 000\r\n");

	MoveToEx(hDC, (int)line->p1->x, (int)line->p1->y, NULL);
	LineTo(hDC, (int)(line->p2)->x, (int)(line->p2)->y );
	printf("GamePaint_011: 001\r\n");

	line->print();

	if ( line->c1 != nullptr ) {
		SetRect( &rect, (int)line->p1->x - scale_2, (int)line->p1->y - scale_2, (int)line->p1->x + scale_2, (int)line->p1->y + scale_2 );
		//DrawText(hDC, (LPCWSTR)(line->c1), -1, &rect, DT_NOCLIP);
		//DrawTextA( hdc, this->button_name, array_count(this->button_name), &rect, DT_TOP);
		DrawTextA( hDC, (line->c1), array_count(line->c1), &rect, DT_TOP);
	}
	printf("GamePaint_011: 002\r\n");

	if ( line->c2 != nullptr ) {
		SetRect( &rect_2, (int)line->p2->x - scale_2, (int)line->p2->y - scale_2, (int)line->p2->x + scale_2, (int)line->p2->y + scale_2 );
		//DrawText( hDC, (LPCWSTR)(line->c2), -1, &rect_2, DT_NOCLIP );
		DrawTextA( hDC, (line->c2), array_count(line->c2), &rect, DT_TOP);
	}
	printf("GamePaint_011: 003\r\n");

	return;
}

// customized from GamePaint_009
//
//
//
//
void GamePaint_012( HDC hDC, POINT* points, int num ) {
	static RECT rect;
	int retval;

	if (paintedFlag == 0) return;

	SelectObject( hDC , CreateSolidBrush(0x88));
	retval = SetPolyFillMode( hDC, ALTERNATE);
	retval = Polygon( hDC, points, num);  
	DeleteObject(SelectObject(hDC , GetStockObject(0x88)));

//	Polygon( hDC, points, num );

//	SetRect( &rect, (int)x1, (int)y1, (int)x2, (int)y2 );
//	FillRect(hDC, &rect, (HBRUSH) (COLOR_WINDOW+1));

	return;
}

//
//
//
//
//
void wKickEventDisplayThreeD::kickPaintEvent(HWND hWnd, HDC hdc, PAINTSTRUCT* ps, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	int result_draw = dDisplayControls_wmpaint_display_threeD_proc_OnRails(hWnd, hdc, ps, uMsg, wParam, lParam);

	return;
}