我按照以下教程进行操作:http: //www.winprog.org/tutorial/simple_window.html
我对教程中的所有内容以及我的测试程序的工作有一个合理的理解。我尝试使用 DLL 的 hInstance 为 winamp 创建一个插件,因为它是导入的,并且父 hwnd 由 winamp 提供给我的插件。
它进入消息循环,但什么都看不到。
const char windowClassName[] = "LastScrobblerConfig";
WNDCLASSEX wc;
HWND hwnd;
MSG msg;
// the window class
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = WinEvents;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = plugin.hDllInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = NULL;
wc.lpszClassName = windowClassName;
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
if (!RegisterClassEx(&wc))
{
MessageBox(NULL, "Window Registration Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
hwnd = CreateWindowEx (
WS_EX_WINDOWEDGE,
windowClassName,
plugin.description,
WS_TILEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
400,
400,
plugin.hwndParent,
NULL,
plugin.hDllInstance,
NULL
);
if (hwnd == NULL)
{
MessageBox(NULL, "Window Create Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
ShowWindow(hwnd, 1);
UpdateWindow(hwnd);
while(GetMessage(&msg, NULL, 0, 0) > 0)
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}