［聲明］
Declare Function GetEnhMetaFileHeader Lib "gdi32" Alias "GetEnhMetaFileHeader" (ByVal hemf As Long, ByVal cbBuffer As Long, lpemh As ENHMETAHEADER) As Long
［說明］
取得增強型圖元檔案的圖元檔案頭
［參數表］
hemf ----------- Long，指向一個增強型圖元檔案的句柄
cbBuffer ------- Long，ENHMETAHEADER結構的大小
lpemh ---------- ENHMETAHEADER
