+// ----------------------------------------------------------------------------
+// determine if this is the primary display
+// ----------------------------------------------------------------------------
+
+bool wxDisplay::IsPrimary() const
+{
+ wxDisplayInfo& dpyInfo = (*gs_displays)[m_index];
+
+ MONITORINFOEX monInfo;
+ wxZeroMemory(monInfo);
+ monInfo.cbSize = sizeof(monInfo);
+
+ // NB: Cast from MONITORINFOEX* to MONITORINFO* is done because
+ // Mingw headers - unlike the ones from Microsoft's Platform SDK -
+ // don't derive the former from the latter in C++ mode and so
+ // the pointer's type is not converted implicitly.
+ if ( !::GetMonitorInfo(dpyInfo.m_hmon, (LPMONITORINFO)&monInfo) )
+ {
+ wxLogLastError(_T("GetMonitorInfo"));
+ }
+
+ return (monInfo.dwFlags & MONITORINFOF_PRIMARY) == MONITORINFOF_PRIMARY;
+}
+