internal static System.Collections.Generic.List <string> ReadStandaloneWindowTitles()
{
var parameter = new EnumWindowsParameter
{
Titles = new System.Collections.Generic.List <string>(),
ProcessId = WindowsApi.GetCurrentProcessId(),
};
var parameterGCHandle = GCHandle.Alloc(parameter);
try
{
WindowsApi.EnumWindows(EnumWindowsCallback, GCHandle.ToIntPtr(parameterGCHandle));
}
finally
{
parameterGCHandle.Free();
}
if (parameter.LastWin32Error != 0)
{
throw new Exception("Unknown error: " + parameter.LastWin32Error);
}
if (!parameter.Found)
{
throw new Exception("No window found");
}
return(parameter.Titles);
}
internal static void Change(string title)
{
// The article https://qiita.com/kirurobo/items/82dd484ad6374e725a43#%E5%95%8F%E9%A1%8C%E7%82%B9-3
// says that System.Diagnostics.Process.GetCurrentProcess().Id fails in some environment. We use
// GetCurrentProcessId() instead believing it will never fail.
var processId = WindowsApi.GetCurrentProcessId();
var parameter = new EnumWindowsParameter
{
Title = title,
ProcessId = processId,
};
var parameterGCHandle = GCHandle.Alloc(parameter);
bool enumWindowsResult;
int enumWindowsError;
try
{
enumWindowsResult = WindowsApi.EnumWindows(EnumWindowsCallback, GCHandle.ToIntPtr(parameterGCHandle));
enumWindowsError = Marshal.GetLastWin32Error();
}
finally
{
parameterGCHandle.Free();
}
if (!enumWindowsResult)
{
throw new StandaloneWindowTitleChangeException(StandaloneWindowTitleChangeException.Error.Unknown,
"Failed to enumerate windows", new Win32Exception(enumWindowsError));
}
if (parameter.InnerException != null)
{
throw new StandaloneWindowTitleChangeException(StandaloneWindowTitleChangeException.Error.Unknown,
parameter.InnerExceptionMessage, parameter.InnerException);
}
if (!parameter.Found)
{
throw new StandaloneWindowTitleChangeException(StandaloneWindowTitleChangeException.Error.NoWindow,
"No window found");
}
}