你好 请帮我在进程名为AC.exe上用C++ D3D绘制一段文字

你好，需要用到Windows API中的Direct3D来绘制文字。以下是一个简单的示例代码：

#include <Windows.h>
#include <d3d9.h>
#include <d3dx9.h>

#pragma comment(lib, "d3d9.lib")
#pragma comment(lib, "d3dx9.lib")

LPDIRECT3D9 g_pD3D = NULL;
LPDIRECT3DDEVICE9 g_pd3dDevice = NULL;
ID3DXFont* g_pFont = NULL;

LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch (msg)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, msg, wParam, lParam);
    }
    return 0;
}

void InitD3D(HWND hWnd)
{
    g_pD3D = Direct3DCreate9(D3D_SDK_VERSION);
    D3DPRESENT_PARAMETERS d3dpp;
    ZeroMemory(&d3dpp, sizeof(d3dpp));
    d3dpp.Windowed = TRUE;
    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
    g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,
        D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_pd3dDevice);
    D3DXCreateFont(g_pd3dDevice, 20, 0, FW_NORMAL, 0, FALSE, DEFAULT_CHARSET,
        OUT_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE,
        TEXT("Arial"), &g_pFont);
}

void Render()
{
    g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 255), 1.0f, 0);
    g_pd3dDevice->BeginScene();
    RECT rct = { 10, 10, 400, 200 };
    g_pFont->DrawText(NULL, TEXT("Hello, World!"), -1, &rct, DT_LEFT, D3DCOLOR_XRGB(255, 255, 255));
    g_pd3dDevice->EndScene();
    g_pd3dDevice->Present(NULL, NULL, NULL, NULL);
}

void Cleanup()
{
    if (g_pFont != NULL)
        g_pFont->Release();
    if (g_pd3dDevice != NULL)
        g_pd3dDevice->Release();
    if (g_pD3D != NULL)
        g_pD3D->Release();
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int nCmdShow)
{
    WNDCLASSEX wc;
    ZeroMemory(&wc, sizeof(wc));
    wc.cbSize = sizeof(wc);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WndProc;
    wc.hInstance = hInstance;
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.lpszClassName = TEXT("MyWindowClass");
    RegisterClassEx(&wc);

    HWND hWnd = CreateWindowEx(0, TEXT("MyWindowClass"), TEXT("My Window"),
        WS_OVERLAPPEDWINDOW, 0, 0, 800, 600, NULL, NULL, hInstance, NULL);

    InitD3D(hWnd);

    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

    MSG msg;
    ZeroMemory(&msg, sizeof(msg));
    while (msg.message != WM_QUIT)
    {
        if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        else
        {
            Render();
        }
    }

    Cleanup();

    return (int)msg.wParam;
}

这个例子创建了一个窗口，并用D3D绘制了一段文字。你可以将代码放到AC.exe的进程中，但需要注意以下几点：

1. 你需要获取AC.exe的窗口句柄。
2. 你需要在AC.exe的进程中加载D3D库，并调用Windows API中的函数来创建D3D设备。
3. 你需要在AC.exe的进程中创建字体对象，将字体绘制到D3D设备上。

由于涉及到跨进程操作，以上做法可能会被某些杀软或防护软件视为可疑行为。建议在开发过程中注意安全性和法律合规性。