Hi Segger, I am porting emWIN to freeRTOS on NXP i.MXRT MCU, i encountered some problems and need your help. when my code execute "WM_CreateWindowAsChild", a port of RAM memory will be used by this function ex: 0x806FC000 but I have checked GUI_ALLOC_AssignMemory, GUI_MEMORY_ADDR = 0x80000500 , GUI_NUMBER = 0xC0000 I don't know why 0x806FC000 memory will be used by WM_CreateWindowAsChild? Does any memory setting need to modify? if you need any information, I will give you asap.