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FindWindow Help C++

 
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hacksign23
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PostPosted: Fri Nov 28, 2008 5:51 pm    Post subject: FindWindow Help C++ Reply with quote
Well I'm using VC++ Team System 2008 and it gives me a linking error:
C++ linker wrote:

Error 1 error LNK2028: unresolved token (0A00000F) "extern "C" struct HWND__ * __stdcall FindWindowA(char const *,char const *)" (?FindWindowA@@$$J18YGPAUHWND__@@PBD0@Z) referenced in function "private: void __clrcall minez::Form1::button1_Click(class System::Object ^,class System::EventArgs ^)" (?button1_Click@Form1@minez@@$$FA$AAMXP$AAVObject@System@@P$AAVEventArgs@4@@Z) minez.obj minez
Error 2 error LNK2019: unresolved external symbol "extern "C" struct HWND__ * __stdcall FindWindowA(char const *,char const *)" (?FindWindowA@@$$J18YGPAUHWND__@@PBD0@Z) referenced in function "private: void __clrcall minez::Form1::button1_Click(class System::Object ^,class System::EventArgs ^)" (?button1_Click@Form1@minez@@$$FA$AAMXP$AAVObject@System@@P$AAVEventArgs@4@@Z) minez.obj minez
Error 3 fatal error LNK1120: 2 unresolved externals F:\Michael's Magical Folder Of Hippos\programming\C++\minez\Debug\minez.exe 1 minez


and i used
Code:

FindWindow(NULL, (LPCSTR)"Untitled - Notepad");


thanks.
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hcavolsdsadgadsg
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PostPosted: Fri Nov 28, 2008 6:03 pm    Post subject: Reply with quote
I'm not entirely sure how API calls work within managed C++, but I want to say that you're just missing the include.
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sloppy
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PostPosted: Fri Nov 28, 2008 6:13 pm    Post subject: Reply with quote
Deja vu.. http://forum.cheatengine.org/viewtopic.php?t=316937 Rolling Eyes
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BirdsEye
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PostPosted: Fri Nov 28, 2008 6:13 pm    Post subject: Reply with quote
Ugh... Please stop using managed C++. I think you have to declare the function just like in VB.NET and C#. Here
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Noz3001
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PostPosted: Fri Nov 28, 2008 6:41 pm    Post subject: Reply with quote
Linking error?
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hacksign23
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PostPosted: Fri Nov 28, 2008 11:10 pm    Post subject: Reply with quote
?? o_o well is there an alternative way to get a hwnd? And when i say hwnd, not anything else like process or handle. thanks

PS: all the other functions work like WPM,RPM, etc
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sloppy
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PostPosted: Sat Nov 29, 2008 3:59 am    Post subject: Reply with quote
Code:
#include <windows.h>
#pragma comment(lib, "user32.lib")

Code:
HWND hWnd;

if (IsWindow(hWnd = FindWindowA(NULL, "Untitled - Notepad")))
{
     MessageBoxA(NULL, "Found Notepad!", "Test", 0);
}

Didn't realise how easy it is to use native code within managed c++, link to user32.lib and your project should build correctly.

ps. abandon c++.net Razz
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BirdsEye
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PostPosted: Sat Nov 29, 2008 9:33 am    Post subject: Reply with quote
Oh yea, he's right. I've never used C++.NET so beware... I'm not sure if this is the correct method or anything. If you include your headers and link against the USER32 library, it still would give you an ambigious symbol error. HOWEVER, (I got this from messin' around) if you type:
Code:
::
it will give you a list of alot of Win32 API and they function right. See:
Code:

   private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
            
             if(!::FindWindow(TEXT("Notepad"), NULL))
                ::MessageBox(0, TEXT("Error!"), TEXT("Error!"), MB_OK);
             else
                ::MessageBox(0, TEXT("Found!"), TEXT("Found!"), MB_OK);
          }
   };
}
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sloppy
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PostPosted: Sat Nov 29, 2008 10:48 am    Post subject: Reply with quote
Yea, you can avoid the ambiguity by using MessageBoxA, will save you from using the TEXT() macro too.
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rapion124
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PostPosted: Sat Nov 29, 2008 12:28 pm    Post subject: Reply with quote
sloppy wrote:
Yea, you can avoid the ambiguity by using MessageBoxA, will save you from using the TEXT() macro too.


Never specify A or W. Use MessageBox because the tchar.h header will correctly change it to A or W depending on whether UNICODE is defined. The TEXT() is part of tchar. It adds a L infront of the string if UNICODE is defined. This makes it so that you can change from Unicode to ANSI with a simple change in the project settings.
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sloppy
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PostPosted: Sun Nov 30, 2008 3:42 am    Post subject: Reply with quote
Good advice, excuse my sloppy coding practices. Razz
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hacksign23
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PostPosted: Sun Nov 30, 2008 7:38 pm    Post subject: Reply with quote
wowawea it is working now. thanks! oh one more thing:
Code:

         LPCWSTR windowtextaa = NULL;

         //finds windowtextb(before)

         windowtexta=windownameTextbox->Text;//puts text into windowtexta

         windowtextaa = (LPCWSTR)(Marshal::StringToHGlobalAnsi(windowtexta).ToPointer());//windowtexta
         MessageBox::Show(windowtexta);




         if (!SetWindowText(mineHwnd,windowtextaa)) {
            MessageBox::Show("fail D:","D:");
         }


Marshal::FreeHGlobal((IntPtr((void*)windowtextaa)));

I'm using that to convert it to the LPCWSTR crap, but when i put text into the text box, the window name turns into chinese crap o_o
for example:
i put in "aaa" and it comes out whatever is in the screen shot. I don't know what it is. any help?

fail.GIF
 Description:
 Filesize:  1.85 KB
 Viewed:  7387 Time(s)

fail.GIF
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sloppy
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PostPosted: Sun Nov 30, 2008 8:51 pm    Post subject: Reply with quote
Marshal::StringToHGlobalUni(..)
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hacksign23
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PostPosted: Sun Nov 30, 2008 9:41 pm    Post subject: Reply with quote
sloppy wrote:
Marshal::StringToHGlobalUni(..)

Very Happy thanks
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