问PInvoke在带ui/非ui线程差异的WPF中的应用

EN

UINT32 myfunc1()

[DllImport("mydll.dll")]
public static extern uint myfunc1();

uint errorCode = myfunc1(); // returns 0 means no error occured

BackgroundWorker worker = new BackgroundWorker();
worker.DoWork += (s, args) => { args.Result = myfunc1(); };
// 1st call args.Result is 10 means internal error ocurred
// 2nd call args.Result is sometimes 0 and sometimes 10
// 3rd or later calls args.Result is 0 means no error occured
worker.RunWorkerCompleted += doSth();
worker.RunWorkerAsync();