public extern static Int32 GetThemeTextMetrics(IntPtr hTheme, IntPtr hdc, int iPartId, int iStateId, out TEXTMETRIC textMetric);

Declare Function GetThemeTextMetrics Lib "uxtheme.dll" (TODO) As TODO

Public Shared Function GetThemeTextMetrics(hTheme As IntPtr, hdc As IntPtr, iPartId As Integer, iStateId As Integer, ByRef textMetric As TEXTMETRIC) As Int32