VBScript中的Nothing在Delphi里如何表示(100分)

J

jacyoicq

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GUEST, unregistred user!

• 2003-08-01

• #1

如：
IF C IS Nothing THEN
....
END IF

 

H

helloqiner

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GUEST, unregistred user!

• 2003-08-01

• #2

if c = nil then
begin
......
end;

 

J

jacyoicq

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GUEST, unregistred user!

• 2003-08-01

• #3

不对，Imcompatible types

 

L

lichdr

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GUEST, unregistred user!

• 2003-08-01

• #4

c如果是variant用varisnull(c)

 

H

hfghfghfg

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GUEST, unregistred user!

• 2003-08-01

• #5

unassigned

 

H

hfghfghfg

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2003-08-01

• #6

if not assigned(c) then
begin
......
end;

 

J

jacyoicq

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2003-08-01

• #7

接受答案了.