CONST olFolderInbox = 6

DIM Outlook = CREATEOLEOBJ("Outlook.Application")
DIM NameSpace = Outlook.GetNameSpace("MAPI")
DIM Folder = NameSpace.GetDefaultFolder(olFolderInbox)
DIM Items = Folder.Items

DIM start = "2021/01/01"
DIM end = "2021/01/31"

Items = Items.Restrict("[ReceivedTime] >= '" + start + "' AND [ReceivedTime] <= '" + end + "'")

DIM folderspec = "D:\Desktop\Outlook\"
CreateFolders(folderspec)

DIM row = 1

FOR MailItem IN Items
	FUKIDASI(row + "/" + Items.Count)
	FOR i = 1 TO MailItem.Attachments.Count
		DIM Attachment = MailItem.Attachments.Item(i)
		DIM path = folderspec + Attachment
		path = uniqueFilename(path)
		Attachment.SaveAsFile(path)
		PRINT path
	NEXT
	row = row + 1
NEXT

//////////////////////////////////////////////////
// 【引数】
//   folderspec : 作成するフォルダのパス 
// 【戻り値】
//   
//////////////////////////////////////////////////
PROCEDURE CreateFolders(folderspec)
	WITH CREATEOLEOBJ("Scripting.FileSystemObject")
		folderspec = .GetAbsolutePathName(folderspec)
		IF !.DriveExists(.GetDriveName(folderspec)) THEN EXIT
		DIM parentPath = .GetParentFolderName(folderspec)
		IF !.FolderExists(parentPath) THEN CreateFolders(parentPath)
		IF !.FolderExists(folderspec) THEN .CreateFolder(folderspec)
	ENDWITH
FEND

//////////////////////////////////////////////////
// 【引数】
//   path : ファイルのパス 
// 【戻り値】
//   重複しないファイル名 
//////////////////////////////////////////////////
FUNCTION uniqueFilename(path)
	DIM FSO = CREATEOLEOBJ("Scripting.FileSystemObject")
	IFB FSO.FileExists(path) THEN
		DIM fol = FSO.GetParentFolderName(path)
		DIM filename = FSO.GetBaseName(path)
		DIM extension = FSO.GetExtensionName(path)
		DIM i = 2
		WHILE FSO.FileExists(FSO.BuildPath(fol, filename + " (" + i + ")." + extension))
			i = i + 1
		WEND
		RESULT = FSO.BuildPath(fol, filename + " (" + i + ")." + extension)
	ELSE
		RESULT = path
	ENDIF
FEND