c - 如何调用 LocalFree()？

Question

我有这段代码

HLOCAL localHandle;
char *lpText;
localHandle = LocalAlloc(LMEM_MOVEABLE, 40);
if(localHandle)
{
    lpText = (char*)LocalLock(localHandle);
    //Call LocalFree(localHandle) or LocalFree(lpText) ????
}

我应该调用 LocalFree(localHandle); 还是 LocalFree(lpText); ？

Answer 1

LocalFree 的hMem 参数记录为:

A handle to the local memory object. This handle is returned by either the LocalAlloc or LocalReAlloc function. It is not safe to free memory allocated with GlobalAlloc.

因此在您的示例中您需要调用:

LocalFree(localHandle);

别忘了调用LocalUnlock在打电话之前 LocalFree , 减少引用计数。这在使用 LMEM_MOVEABLE 时是强制性的。