C++ 如何在Windows API中更改系统范围内的多个游标

我正在尝试使用

SetSystemCursor

替换多个系统游标。我的第一次调用更改了

OCR\u NORMAL

的光标，但随后的调用不起作用

HCURSOR hWaitCur = LoadCursor(NULL, IDC_WAIT);
HCURSOR cursorCopy = CopyCursor(hWaitCur);

SetSystemCursor(cursorCopy, OCR_NORMAL); // This works

// Not working
SetSystemCursor(cursorCopy, OCR_APPSTARTING); 
SetSystemCursor(cursorCopy, OCR_CROSS);
SetSystemCursor(cursorCopy, OCR_HAND);
SetSystemCursor(cursorCopy, OCR_HELP);
SetSystemCursor(cursorCopy, OCR_IBEAM); 
SetSystemCursor(cursorCopy, OCR_NO);
SetSystemCursor(cursorCopy, OCR_WAIT);

---

一次更新多个系统游标的正确方法是什么？

我找到了解决方案

由于

SetSystemCursor

在设置后会销毁

cursorCopy

，因此每次调用都需要重新复制

hWaitCur

/* ... */

HCURSOR cursorCopy = CopyCursor(cursor);
SetSystemCursor(cursorCopy, OCR_APPSTARTING);

cursorCopy = CopyCursor(cursor);
SetSystemCursor(cursorCopy, OCR_NORMAL);

cursorCopy = CopyCursor(cursor);
SetSystemCursor(cursorCopy, OCR_CROSS);

/* ... */

---

我找到了解决办法

由于

SetSystemCursor

在设置后会销毁

cursorCopy

，因此每次调用都需要重新复制

hWaitCur

/* ... */

HCURSOR cursorCopy = CopyCursor(cursor);
SetSystemCursor(cursorCopy, OCR_APPSTARTING);

cursorCopy = CopyCursor(cursor);
SetSystemCursor(cursorCopy, OCR_NORMAL);

cursorCopy = CopyCursor(cursor);
SetSystemCursor(cursorCopy, OCR_CROSS);

/* ... */

来自（我强调）：

系统通过调用DestroyCursor函数销毁hcur。因此，hcur不能是使用LoadCursor函数加载的游标。要指定从资源加载的游标，请使用CopyCursor函数复制游标，然后将副本传递给SetSystemCursor

因此，您需要在每次通话前复制它：

SetSystemCursor(CopyCursor(hWaitCur), OCR_NORMAL);
SetSystemCursor(CopyCursor(hWaitCur), OCR_APPSTARTING); 
SetSystemCursor(CopyCursor(hWaitCur), OCR_CROSS);
SetSystemCursor(CopyCursor(hWaitCur), OCR_HAND);
SetSystemCursor(CopyCursor(hWaitCur), OCR_HELP);
SetSystemCursor(CopyCursor(hWaitCur), OCR_IBEAM); 
SetSystemCursor(CopyCursor(hWaitCur), OCR_NO);
SetSystemCursor(CopyCursor(hWaitCur), OCR_WAIT);

来自（我强调）：

系统通过调用DestroyCursor函数销毁hcur。因此，hcur不能是使用LoadCursor函数加载的游标。要指定从资源加载的游标，请使用CopyCursor函数复制游标，然后将副本传递给SetSystemCursor

因此，您需要在每次通话前复制它：

SetSystemCursor(CopyCursor(hWaitCur), OCR_NORMAL);
SetSystemCursor(CopyCursor(hWaitCur), OCR_APPSTARTING); 
SetSystemCursor(CopyCursor(hWaitCur), OCR_CROSS);
SetSystemCursor(CopyCursor(hWaitCur), OCR_HAND);
SetSystemCursor(CopyCursor(hWaitCur), OCR_HELP);
SetSystemCursor(CopyCursor(hWaitCur), OCR_IBEAM); 
SetSystemCursor(CopyCursor(hWaitCur), OCR_NO);
SetSystemCursor(CopyCursor(hWaitCur), OCR_WAIT);