Как вывести Form2 из Form1

[BCC32 Error] Unit1.cpp(19): E2451 Undefined symbol 'Form2'
Full parser context
Unit1.cpp(18): parsing: void _fastcall TForm1::Button1Click(TObject *)

bcc32 command line for "Unit1.cpp"
g:\embarcadero\rad studio\9.0\bin\bcc32.exe -D_DEBUG -D_RTLDLL;USEPACKAGES -n.\Win32\Debug -I"g:\embarcadero\rad studio\9.0\include\windows\vcl";
"курсвач";"G:\Embarcadero\RAD Studio\9.0\include\boost_1_39\boost\tr1\ tr1";"G:\Embarcadero\RAD Studio\9.0\include\boost_1_39";"g:\embar cadero\rad
studio\9.0\include";"g:\embarcadero\rad studio\9.0\include\dinkumware";"g:\embar cadero\rad studio\9.0\include\windows\crtl";"g:\emb arcadero\rad
studio\9.0\include\windows\sdk";"g:\emba rcadero\rad studio\9.0\include\windows\rtl";"g:\emba rcadero\rad studio\9.0\include\windows\vcl";"G:\Prog ram
Files (x86)\FastReports\LibD16";"g:\embarcader o\rad studio\9.0\RaveReports\Lib";"C:\Program Files (x86)\Raize\CS5\Lib\RS-XE2\Win32";
"C:\Users\Public\Documents\RAD Studio\9.0\hpp" -y -Q -k -r- -c -tM -tU -tW -C8 -o.\Win32\Debug\Unit1.obj -w-par -Od -v -vi-
-H=.\Win32\Debug\Project2.pch -H Unit1.cpp