C / C++ / MFC

26-Oct-09 2:45

Hi,

I am unable to load my test.dll using LoadLibrary() API. I get error code 126 (Module not found)using GetLastError().
By Dependency Walker, I have come to know that my test.dll depends on "xerces-c_2_7.dll" and "Xalan-C_1_10.dll". These dlls were already present on the same path as the exe.Still I am getting the error.

So I tried to load both the above mentioned third party dlls using LoadLibrary() which returned handle as 0x10000000. By GetLastError() I am getting error code 6 (Invalid Handle).

Can anyone please guide me on why I am getting the Invalid Handle error?

HINSTANCE hLib = LoadLibrary(_T("Xalan-C_1_10"));
	TCHAR szMessage[MAX_PATH];
	FormatMessage(FORMAT_MESSAGE_IGNORE_INSERTS|
		FORMAT_MESSAGE_FROM_SYSTEM,
		NULL, GetLastError(),
		MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL),
		szMessage, MAX_PATH, NULL);
		hLib = LoadLibrary(_T("xerces-c_2_7"));
	FormatMessage(FORMAT_MESSAGE_IGNORE_INSERTS|
		FORMAT_MESSAGE_FROM_SYSTEM,
		NULL, GetLastError(),
		MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL),
		szMessage, MAX_PATH, NULL);

Michael Schubert26-Oct-09 3:08

Michael Schubert

26-Oct-09 3:08

Have you tried this:
HINSTANCE hLib = LoadLibrary(_T("test.dll"));

I noticed that the file extension is missing in your sample code.

Member 450433926-Oct-09 3:18

26-Oct-09 3:18

Yes. It is not making any difference.

CPallini26-Oct-09 3:08

CPallini

26-Oct-09 3:08

Member 4504339 wrote:
I am unable to load my test.dll using LoadLibrary() API. I get error code 126 (Module not found)using GetLastError()

Are you sure the module is in the LoadLibrary search path?

Member 4504339 wrote:
So I tried to load both the above mentioned third party dlls using LoadLibrary() which returned handle as 0x10000000

That's fine.

Member 4504339 wrote:
By GetLastError() I am getting error code 6

Why did you call GetLastError while LoadLibrary didn't fail?
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Member 450433926-Oct-09 3:16

26-Oct-09 3:16

Yes

CPallini26-Oct-09 3:32

CPallini

26-Oct-09 3:32

Just as a silly check, try to put test.dll file into the system directory (for instance: C:\Windows\System32).
Smile | :)

Member 450433926-Oct-09 3:37

26-Oct-09 3:37

It's not making any difference.

CPallini26-Oct-09 3:52

CPallini

26-Oct-09 3:52

Then I would drop any dependance (i.e. make a stub of 'test.dll', an almost-empty DLL just for testing purposes) and then try to load it.
You should stay simple when debugging.

Member 450433927-Oct-09 3:12

27-Oct-09 3:12

Thanks all for replying. I could able to solve the issue. The problem was not with those two third party dlls. test.dll requires some MFC & Visual Studio specific dlls (mfc90d.dll, msvcp71d.dll, msvcp90d.dll, msvcr90.dll, msvcr90d.dll, msvcr71d.dll).

David Crow26-Oct-09 3:40

David Crow

26-Oct-09 3:40

If hLib is not NULL, then LoadLibrary() is not failing.

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Member 450433926-Oct-09 3:42

26-Oct-09 3:42

hLib is NULL for test.dll

Covean26-Oct-09 3:58

Covean

26-Oct-09 3:58

Is it possible that your app is a 64 bit application and your dll an 32 bit dll?

Asking about Source code for scan port

KarstenK26-Oct-09 4:45

KarstenK

26-Oct-09 4:45

you should load the dll from the directory where it was installed, so the dll can find the depending modules. Sigh | :sigh:

Press F1 for help or google it.
Greetings from Germany

onemore8626-Oct-09 0:33

onemore86

26-Oct-09 0:33

Hii everybody,

Now, i have a project about networking but i must to built a program for my project.

I want to scan port for many host & server & dicevice network.

So, could you show me full code(every programing language) about scan port for range IP that it's simple and quickly.

Thanks you so much

my email: onemore86@yahoo.com.vn

Rajesh R Subramanian26-Oct-09 1:06

Rajesh R Subramanian

26-Oct-09 1:06

onemore86 wrote:
Now, i have a project about networking but i must to built a program for my project.

I want to scan port for many host & server & dicevice network.

So, could you show me full code(every programing language) about scan port for range IP that it's simple and quickly.

Point #2 in the post "How to ask a question"[^]:

Be specific! Don't ask "can someone send me the code to create an application that does 'X'. Pinpoint exactly what it is you need help with.

“Follow your bliss.” – Joseph Campbell

Stuart Dootson26-Oct-09 1:40

Stuart Dootson

26-Oct-09 1:40

OP wrote:
every programing language

I thought that part was quite ambitious as well...

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Rajesh R Subramanian26-Oct-09 1:46

Rajesh R Subramanian

26-Oct-09 1:46

I suppose he could get started here[^]. Smile | :)

“Follow your bliss.” – Joseph Campbell