以图形方式拖动选择集 
该函数提示用户拖动一组选定对象,如以下示例所示:acedDragGen() int rc; 
ads_name ssname; 
ads_point return_pt; 
// Prompt the user for a general entity selection.
if (acedSSGet(NULL, NULL, NULL, NULL, ssname) == RTNORM) 
// The newly selected entities  
    rc = acedDragGen(ssname, 
        "Drag selected objects", // Prompt  
        0, // Display normal cursor (crosshairs)  
        dragsample, // Transformation function  
        return_pt); // Set to the specified location.
第四个参数指向执行实体转换的函数。有关 和 的示例,请参见选择集的转换。dragsample()acedDragGen() 父主题: | 
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