控件–Tooltips_class32

使用WindowsAPI，创建Tooltips控件：

#include <windows.h>
#include <commctrl.h>  // Include the common controls
#pragma comment(lib, "comctl32.lib")
#pragma comment(linker,"\"/manifestdependency:type='win32' \
name='Microsoft.Windows.Common-Controls' version='6.0.0.0' \
processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
//Global variables
HINSTANCE g_hInst;
const wchar_t g_szClassName[] = L"myWindowClass";

void CreateToolTipForRect(HWND hwndParent)
{
    // Create a tooltip.
    HWND hwndTT = CreateWindowEx(WS_EX_TOPMOST, TOOLTIPS_CLASS, NULL,
        WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP | WS_EX_TOOLWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
        hwndParent, NULL, g_hInst, NULL);

    SetWindowPos(hwndTT, HWND_TOPMOST, 0, 0, 0, 0,
        SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);

    // Set up "tool" information. In this case, the "tool" is the entire parent window.

    TOOLINFO ti = { 0 };
    ti.cbSize = sizeof(TOOLINFO);
    ti.uFlags = TTF_SUBCLASS;
    ti.hwnd = hwndParent;
    ti.hinst = g_hInst;
    ti.lpszText = (LPWSTR)TEXT("This is your tooltip string.");

    GetClientRect(hwndParent, &ti.rect);

    // Associate the tooltip with the "tool" window.
    SendMessage(hwndTT, TTM_ADDTOOL, 0, (LPARAM)(LPTOOLINFO)&ti);
    SendMessage(hwndTT, TTM_ACTIVATE, TRUE, 0);
}
// Declare WindowProc
LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);

int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR pCmdLine, int nCmdShow)
{
    INITCOMMONCONTROLSEX icex;
    icex.dwSize = sizeof(icex);
    icex.dwICC = ICC_BAR_CLASSES; // Initialize ReBar and ToolBar classes
    InitCommonControlsEx(&icex);

    g_hInst = hInstance;
    WNDCLASSEX wcex;
    HWND hwnd;
    MSG Msg;

    // Registering the Window Class
    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.style = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc = WindowProc;
    wcex.cbClsExtra = 0;
    wcex.cbWndExtra = 0;
    wcex.hInstance = hInstance;
    wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wcex.lpszMenuName = NULL;
    wcex.lpszClassName = g_szClassName;
    wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    if (!RegisterClassEx(&wcex))
    {
        MessageBox(NULL, L"Window Registration Failed!", L"Error!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    // Creating the Window
    hwnd = CreateWindowEx(
        WS_EX_CLIENTEDGE,
        g_szClassName,
        L"The title of my window",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,
        NULL, NULL, hInstance, NULL);

    if (hwnd == NULL)
    {
        MessageBox(NULL, L"Window Creation Failed!", L"Error!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    // Message loop
    while (GetMessage(&Msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
    }
    return (int)Msg.wParam;
}

LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch (msg)
    {
    case WM_CREATE:
    {
        CreateToolTipForRect(hwnd);
        break;
    }
    case WM_CLOSE:
        DestroyWindow(hwnd);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hwnd, msg, wParam, lParam);
    }
    return 0;
}

备注：若要使应用程序能够使用视觉样式，必须使用 ComCtl32.dll 版本 6 或更高版本。 由于版本 6 不可再发行，因此仅在应用程序在包含它的 Windows 版本上运行时才可用。 Windows 附带版本 5 和版本 6。 ComCtl32.dll 版本 6 包含用户控件和公共控件。 默认情况下，应用程序使用 User32.dll 中定义的用户控件以及 ComCtl32.dll 版本 5 中定义的公共控件。 有关 DLL 版本及其分发平台的列表，请参阅公共控件版本。或参考链接：https://learn.microsoft.com/zh-cn/windows/win32/controls/cookbook-overview?redirectedfrom=MSDN#no_extensions

效果图：