[Microprocessor ARM]set up keil to do work

Today I play with ARM Microcontroller ( ARM7 Philips(LPC2000) ).
and I follow manual in CD.
After everything setup finish manual require rebuild.
suddenly many bug show up.

first ,

--- Error: Can't execute 'arm-uclibc-as'
Target not created

I solved by
http://www.keil.com/support/docs/2942.htm
and look back to manual some step doesn't change setting ? or may be I forget to press ok?

second ,
error C318 : can't open file 'LPC214x.H'

this solved by
copy lpc214x.h from example project instead.

third ,
hex file is not built

before solve

solving in project > options for target

after solve

yah then it can build now.

good job u all.

[visual C#] Add UserControl to Toolbox

Nothing hard but I'm stuck with it for an hour.
only choose > build > build solution or press F6. = ="

[Visual C#] Toolbox Disappear

In this semister my works is relate with many computer languages.
my senior Project is use Visual C# to write C#.
my Database Project is use PhpEd to write php.
my WebService Project is use Eclipse to write Java.
my MicroPro Project is use assembly language (this project seem so tried)

Today I hope to do work as usally but after I open visual C#.
I encouter problem that I don't know and never seen.
Toolbox has no components.
Ahhh... how to Solve it!?!?!?!?!?

example bug picture

and then I try google and msdn forum to solve this problem.

First : you should try reset toolbox
if it's not solve
Second : you shold try Tools >> Imports \ Export Setting
some user solved after import then choose this option again and choose default setting.
Third : if do something like upper method you may need reopen software.
Lastly : I recommend you to do is .. open command prompt and open directory
C:\\...\Visual Studio...\Common7\IDE
in this directory has file exe that use to run program (visual XX)

for Visual Studio is devenv.exe
for Visual C# express is vcexpress.exe

after open it then run command "devenv /reinstall" or "vcexpress /reinstall" according your version.
if it can't solve
then use command "devenv /setup" or "vcexpress /setup"

I solve with second command because I use Visual C# :)