屏幕截图在移至第二台显示器时不显示鼠标光标

问题是您从中获得的光标GetCursorInfo2坐标相对于位图而言不是正确的坐标。首先，确定光标点是否位于中lprcMonitor，您可以使用PtInRect，然后使用DrawIcon将hcursor绘制到位图中（如果返回true）。这是从您的代码转换而来的C ++示例（因为我对delphi不熟悉）：

#include <windows.h>
#include <iostream>
#include <string>
#include <string.h>
#include <stdlib.h>
#include <gdiplus.h>
#include <stdio.h>
using namespace Gdiplus;
using namespace std;
#pragma comment(lib, "Gdiplus.lib")
int GetEncoderClsid(const WCHAR* format, CLSID* pClsid)
{
    UINT  num = 0;          // number of image encoders
    UINT  size = 0;         // size of the image encoder array in bytes

    ImageCodecInfo* pImageCodecInfo = NULL;

    GetImageEncodersSize(&num, &size);
    if (size == 0)
        return -1;  // Failure

    pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
    if (pImageCodecInfo == NULL)
        return -1;  // Failure

    GetImageEncoders(num, size, pImageCodecInfo);

    for (UINT j = 0; j < num; ++j)
    {
        if (wcscmp(pImageCodecInfo[j].MimeType, format) == 0)
        {
            *pClsid = pImageCodecInfo[j].Clsid;
            free(pImageCodecInfo);
            return j;  // Success
        }
    }

    free(pImageCodecInfo);
    return -1;  // Failure
}

//HCURSOR GetCursorInfo2(POINT * pt)
//{
//    POINT p = { 0 };
//    HWND hWindow = NULL;
//    HCURSOR hCursor = NULL;
//    if (GetCursorPos(&p))
//    {
//        pt->x = p.x;
//        pt->y = p.y;
//        hWindow = WindowFromPoint(*pt);
//        if (IsWindow(hWindow))
//        {
//            DWORD dwThreadID = GetWindowThreadProcessId(hWindow, NULL);
//            DWORD dwCurrentThreadID = GetCurrentThreadId();
//            if (dwCurrentThreadID != dwThreadID)
//            {
//                if (AttachThreadInput(dwCurrentThreadID, dwThreadID, TRUE))
//                {
//                    hCursor = GetCursor();
//                    AttachThreadInput(dwCurrentThreadID, dwThreadID, FALSE);
//                }
//            }
//        }
//    }
//    return hCursor;
//}
void TakeScreenshot(HDC hdcbmp, HDC WndHdc, int Width, int Height, int Left, int Top)
{
    HDC hdc = GetDC(NULL);
    if (hdc == 0) exit(-1);
    BitBlt(hdcbmp, 0, 0, Width, Height, hdc, Left, Top, SRCCOPY | CAPTUREBLT);
    CURSORINFO cursorinfo = { 0 };
    cursorinfo.cbSize = sizeof(CURSORINFO);
    if (GetCursorInfo(&cursorinfo))
    {
        RECT rc = { Left ,Top,Left + Width ,Top + Height };

        if (PtInRect(&rc, cursorinfo.ptScreenPos))
        {
            DrawIcon(hdcbmp, cursorinfo.ptScreenPos.x - Left, cursorinfo.ptScreenPos.y - Top, cursorinfo.hCursor);
        }
    }
    /*ICONINFO IconInfo = { 0 };
    GetIconInfo(hCursor, &IconInfo);*/
}
BOOL CALLBACK Monitorenumproc(HMONITOR  hMonitor, HDC hdcMonitor, LPRECT lprcMonitor, LPARAM dwData)
{
    static int count = 0;
    int Left = lprcMonitor->left;
    int Top = lprcMonitor->top;
    int Width = lprcMonitor->right - lprcMonitor->left;
    int Height = lprcMonitor->bottom - lprcMonitor->top;

    HDC dev = GetDC(NULL);
    HDC CaptureDC = CreateCompatibleDC(dev);
   
    HBITMAP CaptureBitmap = CreateCompatibleBitmap(dev, Width, Height);
    HGDIOBJ old_obj = SelectObject(CaptureDC, CaptureBitmap);
    TakeScreenshot(CaptureDC, dev, Width, Height, Left, Top);
    Gdiplus::Bitmap bitmap(CaptureBitmap, NULL);
    
    CLSID pngClsid;
    GetEncoderClsid(L"image/bmp", &pngClsid);
    wstring BmpNameString = L"C:\\screen";
    BmpNameString = BmpNameString + std::to_wstring(count) + L".bmp";
    count++;
    bitmap.Save(BmpNameString.c_str(), &pngClsid, NULL);

    SelectObject(CaptureDC, old_obj);
    DeleteDC(CaptureDC);
    ReleaseDC(NULL, dev);
    DeleteObject(CaptureBitmap);
    return TRUE;
}
int main(void)
{
    GdiplusStartupInput gdiplusStartupInput;
    ULONG_PTR gdiplusToken;
    GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

    EnumDisplayMonitors(0, NULL, Monitorenumproc, 0);

    GdiplusShutdown(gdiplusToken);
    return 0;
}

注意功能中的这些行TakeScreenshot：

CURSORINFO cursorinfo = { 0 };
cursorinfo.cbSize = sizeof(CURSORINFO);
if (GetCursorInfo(&cursorinfo))
{
    RECT rc = { Left ,Top,Left + Width ,Top + Height };

    if (PtInRect(&rc, cursorinfo.ptScreenPos))
    {
        DrawIcon(hdcbmp, cursorinfo.ptScreenPos.x - Left, cursorinfo.ptScreenPos.y - Top, cursorinfo.hCursor);
    }
}