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Windows-API-examples/menus/checkmenuitem.c

107 lines
2.6 KiB

#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"Check menu item";
wc.hInstance = hInstance;
wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
wc.lpfnWndProc = WndProc;
wc.hCursor = LoadCursor(0, IDC_ARROW);
RegisterClassW(&wc);
CreateWindowW(wc.lpszClassName, L"Check menu item",
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();
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 == MF_CHECKED) {
ShowWindow(ghSb, SW_HIDE);
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);
}