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<TITLE>Determine which DLLs are needed by a program</TITLE>
<META NAME="Author" CONTENT="Harold Howe">
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<H3>
Determine which DLLs are needed by a program
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<P>
Use the command line utility <TT>TDUMP.EXE</TT> that comes with C++Builder. <TT>TDUMP</TT> will list the imported
modules of a program if you pass it the command line parameter "<TT>-em.</TT>". Note the trailing period. To list the
imported DLLs from <TT>PROJECT1.EXE</TT>, execute this command from a DOS prompt:
</P>
<PRE>
tdump -em. project1.exe
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<P>
The text below shows the output of <TT>TDUMP</TT>. In this example, the project was compiled with the dynamic RTL
option on, but with runtime packages turned off.
</P>
<PRE>
C:\CBuilder4\Projects>tdump -em. project1.exe | more
Turbo Dump Version 5.0.16.6 Copyright (c) 1988, 1999 Inprise Corporation
Display of File PROJECT1.EXE
IMPORT: borlndmm.dll
IMPORT: ADVAPI32.DLL
IMPORT: KERNEL32.DLL
IMPORT: COMCTL32.DLL
IMPORT: GDI32.DLL
IMPORT: USER32.DLL
IMPORT: OLE32.DLL
IMPORT: OLEAUT32.DLL
IMPORT: cp3245mt.dll
</PRE>
<BR>
<P>
The files <TT>borlndmm.dll</TT> and <TT>cp3245mt.dll</TT> are the dynamic RTL DLLs. When I uncheck the RTL checkbox
and statically link with the runtime libraries, the output from <TT>TDUMP</TT> becomes:
</P>
<PRE>
C:\CBuilder4\Projects>tdump -em. project1.exe
Turbo Dump Version 5.0.16.6 Copyright (c) 1988, 1999 Inprise Corporation
Display of File PROJECT1.EXE
IMPORT: ADVAPI32.DLL
IMPORT: KERNEL32.DLL
IMPORT: COMCTL32.DLL
IMPORT: GDI32.DLL
IMPORT: USER32.DLL
IMPORT: OLE32.DLL
IMPORT: OLEAUT32.DLL
</PRE>
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<P>
When I turn off the runtime libraries option, the compiled program no longer depends on
<TT>borlndmm.dll</TT> and <TT>cp32345mt.dll</TT>.
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<P>
<B>Note:</B> <TT>TDUMP</TT> can only list the DLLs that are implicitly linked to the project using an import library.
<TT>TDUMP</TT> does not list DLLs that loaded with the <TT>LoadLibrary</TT> API function.
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