Here is a quick solution;

Code:
if(multiMonitorInfo.numMonitors)
	{
		int count = 0;
		// get screen rects
		multiMonitorInfo.monitorInfo = (MYMONITORINFO*)sys_malloc(sizeof(MYMONITORINFO)*multiMonitorInfo.numMonitors);
		EnumDisplayMonitors(NULL, NULL, MonitorEnumProc, (LPARAM)&count);
		
		// get display modes
		D3DDISPLAYMODE displayMode;
		int i,j;
		int last_res[2];
		last_res[0]=0;
		last_res[1]=0;
		for(i = 0; i < multiMonitorInfo.numMonitors; i++)
		{
			MYMONITORINFO *pinfo = &(multiMonitorInfo.monitorInfo)[i];
			int maxModes = pd3dKu->GetAdapterModeCount(i,D3DFMT_X8R8G8B8);
			for(j = 0; j < maxModes; j++)
			{
				if(D3D_OK != pd3dKu->EnumAdapterModes(i,D3DFMT_X8R8G8B8,j,&displayMode)) break;
				if(displayMode.Width >= MMminWidth && displayMode.Height >= MMminHeight/* && displayMode.RefreshRate == multiMonitorInfo.currentFrequency*/) 
				{
					if(displayMode.Width==last_res[0]&&displayMode.Height==last_res[1])
					{
						//skip
					}
					else
					{
						pinfo->numModes++;	
						last_res[0]=displayMode.Width;
						last_res[1]=displayMode.Height;
					}
					
				}
				
				
			}
			if(pinfo->numModes)
			{
				last_res[0]=0;
				last_res[1]=0;
				pinfo->displayModes = (DISPLAYMODE*)sys_malloc(sizeof(DISPLAYMODE)*pinfo->numModes);
				int k = 0;
				for(j = 0; j < maxModes; j++)
				{
					if(D3D_OK != pd3dKu->EnumAdapterModes(i,D3DFMT_X8R8G8B8,j,&displayMode)) break;
					if(displayMode.Width >= MMminWidth && displayMode.Height >= MMminHeight /*&& displayMode.RefreshRate == multiMonitorInfo.currentFrequency*/)
					{
						
						if(displayMode.Width==last_res[0]&&displayMode.Height==last_res[1])
						{
							//skip
						}
						else
						{
							DISPLAYMODE* pMode = &(pinfo->displayModes)[k];
							pMode->Width = displayMode.Width;
							pMode->Height = displayMode.Height;
							k++;	
							last_res[0]=displayMode.Width;
							last_res[1]=displayMode.Height;	
						}
						
						
						
					}
				}
			}
			else pinfo->displayModes = NULL;
			MMInfoSortDisplayModes(pinfo,0);
		}
	}