易语言窗口模板源码,窗口模板,组合父菜单图片,创建父菜单,创建子菜单,菜单滚动,鼠标是否在指定窗口内,执行子菜单,API_SetCursorPos,API_SetCapture,API_ReleaseCapture,API_GetCursorPos,API_GetWindowRect,API_PtInRect,API_CallWindowProc,API_SendMessage,