5.1raylib外部绘制搜索框

实现思路

绘制搜索框覆盖在主程序上面

uselib.exe

main.cpp

#define RAYGUI_IMPLEMENTATION
#include "raylib.h"

#ifndef _DEBUG
#pragma comment(lib, "raylib.lib")
#pragma comment(lib, "winmm.lib")
// #pragma comment(lib, "opengl32.lib")
// #pragma comment(lib, "gdi32.lib")
// #pragma comment(lib, "shell32.lib")
// #pragma comment(lib, "user32.lib")
#endif // DEBIG

#pragma comment( linker, "/subsystem:\"windows\" /entry:\"mainCRTStartup\"" ) // 设置入口地址


int main() {
    // 纯净的 Raylib 程序，不包含任何插件加载代码
    InitWindow(800, 600, "Target Process (To be Injected)");
    SetTargetFPS(60);

    while (!WindowShouldClose()) {
        BeginDrawing();
        ClearBackground(DARKBLUE); // 换个颜色，方便区分
        DrawText("I am a standalone program.", 190, 200, 20, RAYWHITE);
        DrawText("I have no searchbox code in my source.", 190, 230, 20, LIGHTGRAY);
        EndDrawing();
    }

    CloseWindow();
    return 0;
}

search.exe

main.cpp

#include "raylib.h"
#include "WindowUtils.h"
#pragma comment( linker, "/subsystem:\"windows\" /entry:\"mainCRTStartup\"" ) // 设置入口地址
int main() {
    SetConfigFlags(FLAG_WINDOW_UNDECORATED | FLAG_WINDOW_TRANSPARENT | FLAG_WINDOW_TOPMOST | FLAG_WINDOW_MOUSE_PASSTHROUGH);
    SetTargetFPS(60); // 必须限制帧率，不要跑太快
    InitWindow(800, 600, "SearchBox");

    // GetWindowHandle() 在 Raylib 中返回的就是 void*
    void* handle = GetWindowHandle();

    while (!WindowShouldClose()) {
        SimpleFollow(handle, "Target Process (To be Injected)", "GLFW30");

        BeginDrawing();
        ClearBackground(BLANK);

        // 绘制一个静态的搜索框 UI
        int sw = GetScreenWidth();
        Rectangle box = { (float)sw / 2 - 200, 50, 400, 45 };

        // 绘制背景和边框
        DrawRectangleRec(box, Fade(BLACK, 0.8f));
        DrawRectangleLinesEx(box, 2, SKYBLUE);

        // 绘制静态文字
        DrawText("Search Box Active", (int)box.x + 20, (int)box.y + 12, 20, RAYWHITE);

        // 模拟一个放大镜小图标
        DrawCircle((int)box.x + 360, (int)box.y + 22, 8, SKYBLUE);
        DrawLine((int)box.x + 365, (int)box.y + 27, (int)box.x + 375, (int)box.y + 37, SKYBLUE);

        EndDrawing();
    }

    CloseWindow();
    return 0;
}

WindowUtils.h

#pragma once

void SimpleFollow(void* myHandle, const char* targetTitle, const char* targetClass);
void EstablishLink(void* myHandle, void* targetHandle);

WindowUtils.cpp

#include "WindowUtils.h"
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <cmath>

void SimpleFollow(void* myHandle, const char* targetTitle, const char* targetClass) {
    HWND myHwnd = (HWND)myHandle;
    static HWND targetHwnd = NULL;

    // 定期寻找目标窗口句柄
    static int findCounter = 0;
    if (findCounter++ % 60 == 0) {
        targetHwnd = FindWindowA(targetClass, targetTitle);
    }

    if (targetHwnd && IsWindow(targetHwnd)) {
        // --- 核心逻辑：判断是否应该显示 ---
        HWND foregroundHwnd = GetForegroundWindow();

        // 只有当当前焦点在 [目标程序] 或 [搜索框本身] 时，才显示
        if (foregroundHwnd == targetHwnd || foregroundHwnd == myHwnd) {
            // 如果窗口之前是隐藏的，显示它
            if (!IsWindowVisible(myHwnd)) {
                ShowWindow(myHwnd, SW_SHOWNOACTIVATE);
            }

            // 同步位置
            RECT rect;
            if (GetWindowRect(targetHwnd, &rect)) {
                static RECT lastRect = { 0 };
                if (rect.left != lastRect.left || rect.top != lastRect.top) {
                    SetWindowPos(myHwnd, HWND_TOPMOST, rect.left, rect.top,
                        rect.right - rect.left, rect.bottom - rect.top,
                        SWP_NOACTIVATE);
                    lastRect = rect;
                }
            }
        }
        else {
            // 如果焦点在别的程序（如浏览器）上，隐藏自己
            if (IsWindowVisible(myHwnd)) {
                ShowWindow(myHwnd, SW_HIDE);
            }
        }
    }
    else {
        // 找不到目标程序时也隐藏
        if (IsWindowVisible(myHwnd)) {
            ShowWindow(myHwnd, SW_HIDE);
        }
    }
}
void EstablishLink(void* myHandle, HWND targetHwnd) {
    HWND myHwnd = (HWND)myHandle;

    // 获取当前的 Owner
    HWND currentOwner = (HWND)GetWindowLongPtr(myHwnd, GWLP_HWNDPARENT);

    if (currentOwner != targetHwnd) {
        // 关键：通过设置 GWLP_HWNDPARENT (在窗口样式中实际表现为 Owner)
        // 建立“寄生”关系，使 Search 永远浮在 UseRay 之上
        SetWindowLongPtr(myHwnd, GWLP_HWNDPARENT, (LONG_PTR)targetHwnd);

        // 刷新窗口样式
        SetWindowPos(myHwnd, NULL, 0, 0, 0, 0,
            SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_FRAMECHANGED);
    }
}