C / C++ / MFC

Re: SetLayeredWindowAttributes() - Undeclared identifier

23-Jan-09 22:06

hi,
i am trying to transparent the dialog with color using this code. I included the windows.h and winuser.h
<pre>
SetLayeredWindowAttributes(GetSafeHwnd(),RGB(10,34,56),10,(LWA_COLORKEY|LWA_ALPHA));
</pre>

But it gives following error.

\\ITD254\VCC\Notes\NotesDlg.cpp(168) : error C2065: 'SetLayeredWindowAttributes' : undeclared identifier
\\ITD254\VCC\Notes\NotesDlg.cpp(168) : error C2065: 'LWA_COLORKEY' : undeclared identifier
\\ITD254\VCC\Notes\NotesDlg.cpp(168) : error C2065: 'LWA_ALPHA' : undeclared identifier

what i have to do

Ganesh

Naveen23-Jan-09 22:39

23-Jan-09 22:39

Which version of visual studio are you using? Have you set win version (_WIN32_WINNT ) to 0x0501 ?

Re: SetLayeredWindowAttributes() - Undeclared identifier

ganesh.dp23-Jan-09 22:56

Re: SetLayeredWindowAttributes() - Undeclared identifier

23-Jan-09 22:56

vc 6.0 and i tried #define WINVER 0x0500

Os- winxp

ganesh.dp23-Jan-09 23:00

Re: SetLayeredWindowAttributes() - Undeclared identifier

23-Jan-09 23:00

i opened the winuser.h and found that SetLayeredWindowAttributes() is not available.
for that i downloaded winuser.h, which has SetLayeredWindowAttributes() and replaced original but now compiler tells so many errors in winuser.h

any solution

Naveen23-Jan-09 23:07

23-Jan-09 23:07

ganesh.dp wrote:
i opened the winuser.h and found that SetLayeredWindowAttributes() is not available.

The SetLayeredWindowAttributes() will not be existing in the header files that comes with visual studio 6. So either you can download the platform SDK from here[^] and integrate it with VC6

or

Call the SetLayeredWindowAttributes() dynamically, using the LoadLibrary() and GetProcAddress() functions. The SetLayeredWindowAttributes exists in user32.dll dll and the value of LWA_COLORKEY and LWA_ALPHA are...

#define LWA_COLORKEY 0x00000001
#define LWA_ALPHA 0x00000002

Re: SetLayeredWindowAttributes() - Undeclared identifier

ganesh.dp23-Jan-09 23:28

Re: SetLayeredWindowAttributes() - Undeclared identifier

23-Jan-09 23:28

i got user32.dll

but i have some doubt.
1. can i load that dll from my project folder(because i download that from web, my don't doesn't)
2. if load that file in dynamic mode, but before that compiler gives error(for setlayeredwondowattributes()).

Frankly saying i'm new to VC so please guide me

Naveen23-Jan-09 23:39

23-Jan-09 23:39

ganesh.dp wrote:
1. can i load that dll from my project folder(because i download that from web, my don't doesn't)

No you dont have to download it from net. That dll comes with the installation of OS. it exists in the "c:\WINDOWS\system32\user32.dll"

ganesh.dp wrote:
2. if load that file in dynamic mode, but before that compiler gives error(for setlayeredwondowattributes()).

ok. This is how to call that function dynamically.

#define LWA_COLORKEY 0x00000001
#define LWA_ALPHA 0x00000002 
typedef BOOL (WINAPI *pSetLayeredWindowAttributes)( HWND hwnd, COLORREF crKey, BYTE bAlpha, DWORD dwFlags ); 


HMODULE hUser32 = LoadLibrary( _T("User32.dll"));
pSetLayeredWindowAttributes fnSetLayeredWindowAttributes = (pSetLayeredWindowAttributes)GetProcAddress( hUser32, "SetLayeredWindowAttributes");
if( 0 == fnSetLayeredWindowAttributes )
{
	AfxMessageBox( _T("Failed to load SetLayeredWindowAttributes function"));
}
else
{
	// Call the SetLayeredWindowAttributes function
	fnSetLayeredWindowAttributes( m_hWnd, 0, 100, LWA_ALPHA );
}
FreeLibrary( hUser32 );

Re: SetLayeredWindowAttributes() - Undeclared identifier

ganesh.dp24-Jan-09 0:10

Re: SetLayeredWindowAttributes() - Undeclared identifier

24-Jan-09 0:10

thanx...

bit more problem now, there is no compilation error but no transparent or color change is happened..

Naveen24-Jan-09 0:13

24-Jan-09 0:13

ganesh.dp wrote:
bit more problem now, there is no compilation error but no transparent or color change is happened..

Have you set WS_EX_LAYERED style? This style is necessary for the SetLayeredWindowAttributes() function to work.

Re: SetLayeredWindowAttributes() - Undeclared identifier

ganesh.dp24-Jan-09 0:58

Save the file in Unicode format

24-Jan-09 0:58

i got it...
thanx a lot...

Casino War game in C++

Nandu_77b23-Jan-09 20:24

Nandu_77b

23-Jan-09 20:24

Can any one help me where i can get c++ source code for Casino War game. It should be with the below logic
1)Game Engine
2)Client
3)Server Object

IF it wont be avilable over net..can any one help me to understand how to do a casino war game with C++, which should have a)game engine b) client and c)server object.

if nothing is avilable ..pl let me know where i can get these information.

Thanks,
Nandu

Max++23-Jan-09 20:22

Max++

23-Jan-09 20:22

When I Compile my project I got this Warning
"warning C4819: The file contains a character that cannot be represented in the current code page (874). Save the file in Unicode format to prevent data loss"
I want to solve this problem, Please advise
How can I save the file in Unicode format

Re: Save the file in Unicode format

Stuart Dootson23-Jan-09 20:52

Re: Save the file in Unicode format

23-Jan-09 20:52

Does this page[^] help? It's talking about how to save files with different encodings in VS2005, using the File Save dialog.

Rajesh R Subramanian25-Jan-09 4:50

Rajesh R Subramanian

25-Jan-09 4:50

VS editor now supports Unicode characters as well (for strings to be used in the code). If you don't know what Unicode is, I suggest you to please read up on that.

It is a crappy thing, but it's life -^ Carlo Pallini

Best suited sorting algorithm

VCProgrammer23-Jan-09 19:44

VCProgrammer

23-Jan-09 19:44

Hi all,

I have a list control in which there can be very large number of items and there can be very few items also.....

Property of my list is that it is almost sorted.....

So, i wanted to know that which sorting alogorithm will best suit this situation.....

Thanks in advance

Re: Best suited sorting algorithm

VCsamir23-Jan-09 20:05

VCsamir

23-Jan-09 20:05

hi,
u Want to sort list on what basis? Is it a image list??

Samir

Re: Best suited sorting algorithm

VCProgrammer23-Jan-09 20:35

VCProgrammer

23-Jan-09 20:35

no it just contain integers...

Re: Best suited sorting algorithm

Stuart Dootson23-Jan-09 21:06

menubar custom draw in MFC (Very Urgent...............)

23-Jan-09 21:06

VCProgrammer wrote:
So, i wanted to know that which sorting alogorithm will best suit this situation

The one you don't have to write yourself - the sort algorithm[^] in the C++ standard library is pretty much good enough for most cases.

BTW - can you quantify your "very large number of items"? My very old and slow iBook will sort a million (random) integers in 200 milliseconds using std::sort - that's reasonably quick...

AnithaSubramani23-Jan-09 18:24

AnithaSubramani

23-Jan-09 18:24

Hi!

I want to custom-draw menubar in MFC dialog based application.I need the sample code.

Pls help me..............

Thanks & Regards,

Anitha

<div class="ForumMod">modified on Saturday, January 24, 2009 12:51 AM</div>

Re: menubar custom draw in MFC (Very Urgent...............)

VCsamir23-Jan-09 20:18

VCsamir

23-Jan-09 20:18

Check if this link help u Smile | :)

http://edndoc.esri.com/arcobjects/9.0/Samples/Application_Framework/Custom_MultiItem_and_Menu/CustomMultiItemAndMenu.htm

Re: menubar custom draw in MFC (Very Urgent...............)

Stuart Dootson23-Jan-09 21:08

Re: menubar custom draw in MFC (Very Urgent...............)

23-Jan-09 21:08

Try this[^]

AnithaSubramani23-Jan-09 21:31

AnithaSubramani

23-Jan-09 21:31

I need in Dialog based application not in SDI.

Re: menubar custom draw in MFC (Very Urgent...............)

Stuart Dootson23-Jan-09 22:47