[SOLVED] [C++, WinApi] Transparent EditBox

[mrexodia]

Hey everyone,

Today I've wasted quite a lot of hours with trying to make a transparent edit box, which operates properly.

I managed to create this transparent background, but when I typ is stuff or remove stuff it goes all bad (on windows xp only)

I use this code to make the edit transparent:

case WM_CTLCOLOREDIT:
{
  RECT rect_edit= {0};
  RECT rect_window= {0};
  GetWindowRect(hwndDlg, &rect_window); //Window placement
  GetWindowRect((HWND)lParam, &rect_edit); //Control placement  SetBkMode((HDC) wParam, TRANSPARENT); //Transparent control
  SetTextColor((HDC) wParam, RGB(255, 255, 255)); //White text
  //Set the brush origin (relative placement)
  SetBrushOrgEx((HDC)wParam, rect_window.left-rect_edit.left, rect_window.top-rect_edit.top, 0);
  return (BOOL)hBrush;
}

My question to you guys: What should I do? Maybe handle some messages and force redraw?

Thanks in advance,

Mr. eXoDia

PS I attached the full source code...

KeyGen_example.rar

PS2 For the ones who cannot download my source: http://codepad.org/ajqIvwl1

Edited September 23, 2012 by Mr. eXoDia

[kao]

Last time I tried something like that loooooong time ago, and it was annoyingly hard. Maybe this article will help: http://www.drx.dk/bktxtedit.php

[paul]

If you're using MSVC , try adding this to your main cpp file.

#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' ""version='6.0.0.0' processorArchitecture='X86' publicKeyToken='6595b64144ccf1df' language='*'\"")

Don't really know if it'll help in your case but I used to have issues with the way controls showed up in XP as well and this fixed it back in the day.

[mrexodia]

@kao: thanks for your suggestion, but I've already seens that page..

@paul: good suggestion, but I already embedding a manifest in my exe

[mrexodia]

I solved it!

Basically the only thing I had to do was redrawing the window every time the user entered something in the text box. I simply added:

case WM_COMMAND:
   RedrawWindow((HWND)lParam, 0, 0, RDW_INVALIDATE|RDW_UPDATENOW|RDW_ERASE);

Thanks for all your suggestions, hopefully this is helpful to somebody else too!

Greetings,

Mr. eXoDia

Edited September 23, 2012 by Mr. eXoDia

[alaphate]

Mr. eXoDia,

Great share! This keygen code is elite.

[mrexodia]

Mr. eXoDia,

Great share! This keygen code is elite.

Hehe, not THAT elite though... Try dragging another window so it overlaps the keygen window and then type stuff in the editbox. It still fails

Edited October 1, 2012 by Mr. eXoDia

[alaphate]

I added a WM_TIMER message with interval of 100ms.

keygenDemo.zip

[mrexodia]

Smart one indeed, will keep it

Greetings