WIN32 代码测试（消息过程 + 信号）

#include 
#include 

#define  MAX_LOADSTRING 256

#define WM_MESSAGE_A  WM_USER+1

WCHAR szTitle[MAX_LOADSTRING] = TEXT("demo");

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
VOID CALLBACK   TimerProc(HWND hWnd, UINT message, UINT_PTR itimer, DWORD dwTime);

bool  InitInstance(HINSTANCE hInstance, int   nCmdShow);
ATOM RegisterWndClass(HINSTANCE hInstance);

HANDLE g_hOutput = nullptr;

int APIENTRY wWinMain(
	_In_ HINSTANCE hInstance,
	_In_ HINSTANCE hPrevInstance,
	_In_ LPWSTR lpCmdLine,
	_In_ int   nCmdShow) {

	AllocConsole();
	g_hOutput = GetStdHandle(STD_OUTPUT_HANDLE);

	RegisterWndClass(hInstance);
	if (!InitInstance(hInstance, nCmdShow)) {
		return -1;
	}

	MSG msg;
	
	while (TRUE) {
		if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
			if (msg.message == WM_QUIT)
				break;
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
		else {
		
		}
	}


	return (int)msg.wParam;
}

ATOM RegisterWndClass(HINSTANCE hInstance) {
	WNDCLASS  wnd;
	wnd.cbClsExtra = 0;
	wnd.cbWndExtra = 0;
	wnd.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wnd.hCursor = LoadCursor(NULL, IDC_ARROW);
	wnd.hIcon = LoadIcon(NULL, IDI_APPLICATION);

	wnd.lpfnWndProc = WndProc;
	wnd.lpszClassName = szTitle;
	wnd.lpszMenuName = NULL;
	wnd.style = CS_HREDRAW | CS_VREDRAW;
	wnd.hInstance = hInstance;
	return RegisterClass(&wnd);
}

bool  InitInstance(HINSTANCE hInstance, int   nCmdShow) {
	HWND hWnd = CreateWindow(szTitle, L"windows", WS_OVERLAPPEDWINDOW, 0, 0, 300, 300,
		NULL, NULL, hInstance, NULL);
	if (!hWnd)
		return false;

	ShowWindow(hWnd, nCmdShow);
	UpdateWindow(hWnd);
	return true;
}

void onWMCREATEMessage(HWND hWnd, WPARAM wParam) {
	SetTimer(hWnd, 1, 1000, TimerProc);
	PostMessage(hWnd, WM_MESSAGE_A, NULL, NULL);
	//SendMessage(hWnd, WM_MESSAGE_A, NULL, NULL);
}

void onWMKeyMessage(HWND hWnd, WPARAM wParam) {
	wchar_t szTest[256];
	swprintf(szTest,256, L"WM_KEYDOWN 的值是： %dn", wParam);
	WriteConsole(g_hOutput, szTest, lstrlenW(szTest), 0, 0);
}

void onWMCHARMessage(HWND hWnd, WPARAM wParam) {
	wchar_t szTest[256];
	swprintf(szTest, 256, L"WM_CHAR 的值是： %dn", wParam);
	WriteConsole(g_hOutput, szTest, lstrlenW(szTest), 0, 0);
}

void onWMTIMERMessage(HWND hWnd, WPARAM wParam) {
	wchar_t szTest[256];
	swprintf(szTest, 256, L"WndProc WM_TIMER 的值是： %dn", wParam);
	WriteConsole(g_hOutput, szTest, lstrlenW(szTest), 0, 0);
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
	switch (message){
	case WM_CREATE:
		onWMCREATEMessage(hWnd, wParam);
		return 0;
	case WM_KEYDOWN:
		onWMKeyMessage(hWnd, wParam);
		break;
	case WM_CHAR:
		onWMCHARMessage(hWnd, wParam);
		break;
	case WM_TIMER:
		onWMTIMERMessage(hWnd, wParam);
		return 0;
	case WM_MESSAGE_A:
		MessageBox(NULL, TEXT(""), TEXT(""), NULL);
		return 0;
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	default:
		break;
	}

	return DefWindowProc(hWnd, message, wParam, lParam);
}


VOID CALLBACK   TimerProc(HWND hWnd, UINT message, UINT_PTR itimer, DWORD dwTime) {
	wchar_t szTest[256];
	swprintf(szTest, 256, L"TimerProc WM_TIMER 的值是： %dn", message);
	WriteConsole(g_hOutput, szTest, lstrlenW(szTest), 0, 0);
}