Transparency

hi,

A just saw a program and the window was transparent. You could see your desktop through it, it was pretty cool. You could also adjust the transparency.
How can I do this. (win32 api, no MFC)

The program also said that it was for win2k or better. When I implement this function in my program is it possible to run the program on 98 or millennium, if I first test which OS is on it and use en if statement to bypass this function.

thx

This link might help.

yes, this is what I was looking for.

thanks Zen:p

They talk about SetLayeredWindowAttributes(),WS_EX_LAYERED,...
My compiler (VC++6),doesn't know them (error:WS_EX_LAYERED' : undeclared identifier)

are there libraries and heatherfiles that I don't have?
Does anyone ever used these functions or styles?
can't find any info on msdn or google about which files to include

thx

You'll need this before you include windows.h -

#define _WIN32_WINNT 0x0500

You may also need an update of the platform SDK from MS.

I've done that and it still doesn't work.

I also doawloaded service pack 5 for vc++ and that doesn't help either.(maybe stupid question but:are service packs the same as an sdk update)

got any other ideas?

ok this can help you

Code:

---

#ifndef WS_EX_LAYERED
#define WS_EX_LAYERED          0x00080000
#define LWA_COLORKEY                        0x00000001
#define LWA_ALPHA              0x00000002
#endif // ndef WS_EX_LAYERED

typedef BOOL (WINAPI *lpfnSetLayeredWindowAttributes)(HWND hwnd, COLORREF crKey, BYTE bAlpha, DWORD dwFlags);

---

and also

Code:

---

        lpfnSetLayeredWindowAttributes pSetLayeredWindowAttributes;

        HMODULE hUser32 = GetModuleHandle(_T("USER32.DLL"));

        pSetLayeredWindowAttributes = (lpfnSetLayeredWindowAttributes)GetProcAddress(hUser32, "SetLayeredWindowAttributes");

---

yes,yes,yes. It works finaly. thanks a lot Zen and damyan:D :D :D