c – 使用CreateWindowExW时堆损坏

HWND GetMainWnd(HINSTANCE hInstancE){
static HWND hWnd = NULL;
if (hWnd)
    return hWnd;

RETURN_AT_ERROR(hInstance,null);

WNDCLASSEX wcex = { sizeof(WNDCLASSEX) };
wcex.style          = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc    = MainWndProc;
wcex.hInstance      = hInstance;
wcex.hcursor        = ::LoadcursorW(NULL,IDC_ARROW);
wcex.lpszClassName  = g_config->GetWndClass();

ATOM atom = ::registerClassExW(&wceX);
RETURN_AT_ERROR(atom != 0,null);

hWnd = ::CreateWindowExW(WS_EX_LEFT,g_config->GetWndClass(),WS_POPUP | WS_MINIMIZEBox | WS_CLIPCHILDREN,hInstance,0);

return hWnd;}

在这个字符串上

hWnd = ::CreateWindowExW(WS_EX_LEFT,0);

有一个警告信息框

我按“继续”,然后显示

Unhandled exception at 0x77dae753 in app.exe: 0xC0000374: A heap has been corrupted.

但是,CreateWindowExW返回一个非零值,并创建窗口,因为它应该…