RemoteVstPlugin: Debug LoadLibrary failure

plugins/vst_base/RemoteVstPlugin.cpp

@@ -117,6 +117,25 @@ RemoteVstPlugin * __plugin = NULL;
 HWND __MessageHwnd = NULL;
 
 
+//Returns the last Win32 error, in string format. Returns an empty string if there is no error.
+std::string GetErrorAsString(DWORD errorMessageID)
+{
+	//Get the error message, if any.
+	if(errorMessageID == 0)
+		return std::string(); //No error message has been recorded
+
+	LPSTR messageBuffer = nullptr;
+	size_t size = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+								 NULL, errorMessageID, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, NULL);
+
+	std::string message(messageBuffer, size);
+
+	//Free the buffer.
+	LocalFree(messageBuffer);
+
+	return message;
+}
+
 
 class RemoteVstPlugin : public RemotePluginClient
 {
@@ -785,6 +804,8 @@ bool RemoteVstPlugin::load( const std::string & _plugin_file )
 {
 	if( ( m_libInst = LoadLibraryW( toWString(_plugin_file).c_str() ) ) == NULL )
 	{
+		DWORD error = GetLastError();
+		debugMessage( "LoadLibrary failed: " + GetErrorAsString(error) );
 		// give VstPlugin class a chance to start 32 bit version of RemoteVstPlugin
 		if( GetLastError() == ERROR_BAD_EXE_FORMAT )
 		{