nIDBitmap | 预定义的Windows位图的ID号。具体定义在头文件WINDOWS.H中。可用的值如下:
OBM_BTNCORNERS | OBM_OLD_RESTORE
| OBM_BTSIZE | OBM_OLD_RGARROW
| OBM_CHECK | OBM_OLD_UPARROW
| OBM_CHECKBOXES | OBM_OLD_ZOOM
| OBM_CLOSE | OBM_REDUCE
| OBM_COMBO | OBM_REDUCED
| OBM_DNARROW | OBM_RESTORE
| OBM_DNARROWD | OBM_RESTORED
| OBM_DNARROWI | OBM_RGARROW
| OBM_LFARROW | OBM_RGARROWD
| OBM_LFARROWD | OBM_RGARROWI
| OBM_LFARROWI | OBM_SIZE
| OBM_MNARROW | OBM_UPARROW
| OBM_OLD_CLOSE | OBM_UPARROWD
| OBM_OLD_DNARROW | OBM_UPARROWI
| OBM_OLD_LFARROW | OBM_ZOOM
| OBM_OLD_REDUCE | OBM_ZOOMD
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