ExtTextOut 文本的持续闪烁，在一段时间后，文本将恢复为默认字体

这是我的第一篇文章，所以请原谅任何错误。

我正在使用win32 c ++，我有一个基本窗口，它将提供日期和时间(包括秒(，并相应地更新。此外，我已经这样做了，以便文本将根据鼠标位置稍微改变位置(几乎就像这个演示一样，https://css-tricks.com/animate-a-container-on-mouse-over-using-perspective-and-transform/但它会根据鼠标位置移动 x 和 y，而不是 z(。但是，每当我运行代码时，我的文本都会闪烁，它会瞬间变白，然后再次出现在屏幕上。我认为这是因为我两次绘制某些像素，但我不知道如何修复它。此外，经过一段时间(例如 1-2 分钟(，文本上的字体将恢复为默认字体。在调试期间，我可以看到进程内存不断增加到 20，然后字体更改为默认值，然后再次下降。有什么想法吗？ 我想在本节的某个地方我搞砸了：

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{

switch (message)
{
case WM_COMMAND:
{
int wmId = LOWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
}
break;
#define SECOND_TIMER 2
case WM_TIMER:
if (wParam == SECOND_TIMER)
{
InvalidateRect(hWnd, NULL, TRUE); // invalidate whole window
}
break;
//case WM_ERASEBKGND:
//  return 1;
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
POINT point;
GetCursorPos(&point);
ScreenToClient(hWnd, &point);
ClickAnim(point.x, point.y, hdc);
SetTimer(hWnd, SECOND_TIMER, SECOND_TIMER, NULL);
HFONT hFont = CreateFont(70, 30, 0, 0, FW_DONTCARE, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS, ANTIALIASED_QUALITY, VARIABLE_PITCH, TEXT("Segoe UI Light"));
SelectObject(hdc, hFont);
TCHAR time[100];
TCHAR date[100];
SYSTEMTIME localTime;
GetLocalTime(&localTime);
wsprintfW(time, L"%.2u:%.2u:%.2u", localTime.wHour, localTime.wMinute, localTime.wSecond);
switch (localTime.wMonth)
{
case 1:
wsprintfW(date, L"Jan %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
case 2:
wsprintfW(date, L"Feb %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
case 3:
wsprintfW(date, L"Mar %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
case 4:
wsprintfW(date, L"Apr %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
case 5:
wsprintfW(date, L"May %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
case 6:
wsprintfW(date, L"Jun %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
case 7:
wsprintfW(date, L"Jul %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
case 8:
wsprintfW(date, L"Aug %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
case 9:
wsprintfW(date, L"Sep %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
case 10:
wsprintfW(date, L"Oct %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
case 11:
wsprintfW(date, L"Nov %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
case 12:
wsprintfW(date, L"Dec %.2u, %.2u", localTime.wDay, localTime.wYear);
break;
}
RECT desktop;
// Get a handle to the desktop window
const HWND hDesktop = GetDesktopWindow();
// Get the size of screen to the variable desktop
GetClientRect(hDesktop, &desktop);
// TODO: Add any drawing code that uses hdc here...
//get dimensions of window
RECT rect;
GetClientRect(hWnd, &rect);
HWND desktophWnd = GetDesktopWindow();

ExtTextOut(hdc, rect.right / 2 - 95 - point.x / 100, rect.bottom / 2 - 40 - point.y / 100, ETO_OPAQUE, NULL, time, _tcslen(time), NULL);
HFONT smallFont = CreateFont(35, 15, 0, 0, FW_DONTCARE, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_OUTLINE_PRECIS,
CLIP_DEFAULT_PRECIS, ANTIALIASED_QUALITY, VARIABLE_PITCH, TEXT("Segoe UI"));
SelectObject(hdc, smallFont);
ExtTextOut(hdc, rect.right / 2 - 85 - point.x / 100, rect.bottom / 2 - 70 - point.y / 100, ETO_OPAQUE, NULL, date, _tcslen(date), NULL);

EndPaint(hWnd, &ps);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;

}