A CheckMenuItem

#include <windows.h>
#include <commctrl.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
void AddMenus(HWND);

#define IDM_VIEW_STB 1

HWND ghSb;
HMENU ghMenu;

int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
PWSTR lpCmdLine, int nCmdShow)
{
MSG  msg;
WNDCLASSW wc = {0};
wc.lpszClassName = L"Menu";
wc.hInstance     = hInstance;
wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
wc.lpfnWndProc   = WndProc;
wc.hCursor       = LoadCursor(0, IDC_ARROW);

RegisterClassW(&wc);
CreateWindowW(wc.lpszClassName, L"CheckMenu",
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
100, 100, 350, 250, 0, 0, hInstance, 0);

while( GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}

return (int) msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam)
{
UINT state;

switch(msg)
{
case WM_CREATE:
AddMenus(hwnd);

InitCommonControls();//初始化标准控件

// This code creates a statusbar,创建状态bar 也就是一个窗口
ghSb = CreateWindowExW(0, STATUSCLASSNAMEW, NULL,
WS_CHILD | WS_VISIBLE, 0, 0, 0, 0, hwnd,
(HMENU) 1, GetModuleHandle(NULL), NULL);

break;

case WM_COMMAND:

switch(LOWORD(wParam)) {
case IDM_VIEW_STB:

state = GetMenuState(ghMenu, IDM_VIEW_STB, MF_BYCOMMAND);

if (state == SW_SHOWNA) {
ShowWindow(ghSb, SW_HIDE); // 显示ghsb,即状态栏bar.
CheckMenuItem(ghMenu, IDM_VIEW_STB, MF_UNCHECKED);
} else {
ShowWindow(ghSb, SW_SHOWNA);
CheckMenuItem(ghMenu, IDM_VIEW_STB, MF_CHECKED);
}

break;
}
break;

case WM_SIZE:
SendMessage(ghSb, WM_SIZE, wParam, lParam);
break;

case WM_DESTROY:
PostQuitMessage(0);
break;
}

return DefWindowProcW(hwnd, msg, wParam, lParam);
}

void AddMenus(HWND hwnd)
{
HMENU hMenubar;

hMenubar = CreateMenu();
ghMenu = CreateMenu();

AppendMenuW(ghMenu, MF_STRING, IDM_VIEW_STB, L"&Statusbar");
CheckMenuItem(ghMenu, IDM_VIEW_STB, MF_CHECKED);

AppendMenuW(hMenubar, MF_POPUP, (UINT_PTR) ghMenu, L"&View");

SetMenu(hwnd, hMenubar);
}