FindWindow Weird Error

Hi im getting a error:

PHP Code:

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error C2440: '=' : cannot convert from 'class CWnd *' to 'struct HWND__ *'
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
Error executing cl.exe. 


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My Code is:

PHP Code:

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    HWND i;
    HWND x;
    
    i = FindWindow("Program",0); 


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You're mixing MFC and API.

Use ::FindWindow(...).

Since you're already using MFC:

Code:

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CWnd *pWnd;

pWnd = FindWindow("Program", 0);

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Don't forget that the CWnd pointer is not valid any longer than the function you're in. After that it might get deleted at any time.

ok i got it using parksies' way. Now can you tell me how do i convert the HWND to Char ?

Why would you want to do that? (maybe you can just cast it)

How do i cast it ? What is casting it?

First please explain me why you want to convert it to a char?

Code:

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MessageBox(myhWnd,(LPSTR)myhWnd, "Casting!", MB_OK);

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that's casting what's happening over there at the bold part.
I know this example won't work, but it's just to illustrate how casting works. It kinda tells the compiler that you want it to send the HWND as a LPSTR to the MessageBox function.

damn my explaining is totally blurry today, hope you understand what I mean.

Mine is more MFC-like...


Whatever. You can't convert HWND (32-bit) to char (8-bit) without loss of most the data you want. If you however (as I assume) want to convert the HWND to a string of some kind then you have three options.

The first I'd recommend the least:

Code:

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// To decimal:
char decimalbuf[12];
sprintf(decimalbuf, "%i", hwnd);
// To hex:
char hexbuf[12];
sprintf(hexbuf, "0x%8x", hwnd);

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The second is the most MFC-like as it uses the MFC string class CString:

Code:

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// To decimal:
CString strDecimal;
strDecimal.Format("%i", hwnd);
// To hex:
CString strHex;
strHex.Format("0x%8x", hwnd);

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The third is under normal circumstances (that is, if you're not using MFC) the best and uses the STL classes. Requires <sstream>, <iomanip> and <string> to be included.

Code:

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ostringstream ss;
// To decimal:
ss << hwnd;
string strDecimal = ss.str();
// Reset ss:
ss.str("");
// To Hex:
ss << setbase(16) << hwnd;
string strHex = ss.str();

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Jop, be careful, he might really try what you're posting.

Casting only works to some extent. The above is likely to result in an access violation. If not it would only output garbage.

Hehe that wasn't my intention, and while I was posting it I was sure that I wasn't explaining things clearly, so I thought I would illustrate it, which made it even worse :) just ignore my post JasonLpz!