Bool IsAppThemed() 检测视觉样式是否可用。
HTHEME OpenThemeData(HWND hwnd,LPCWSTR pszClassList)
Opens the theme data for a window and its associated class.OpenThemeData tries to match each class,
one at a time, to a class data section in the active theme.
hwnd: Handle of the window for which theme data is required.
pszClassList: Pointer to a string that contains a semicolon-separated list of classes.
Theme 主题函数都依据 OpenThemeData() 返回的 HTHEME 句柄作为参数。
hwnd: 窗口或控件句柄
pszClassList:Standard Controls and Windows
标准控件或窗口的class名,可以参考msdn:Parts and States of Standard Controls and Windows
OpenThemeData(hwnd, L"Button");
也可参考:codeproject上的讨论
HRESULT DrawThemeText() 使用由视觉样式定义的颜色和字体绘制文本。
https://msdn.microsoft.com/en-us/library/windows/desktop/aa383751(v=vs.85).aspx#LPCWSTR