non client area buttons (maximize, minimize, close) do not glow

Gernot Frisch

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Feb 7, 2012, 4:37:28 PM2/7/12

to

Hi,

I have a very simple Win32 API program, but the top-right 3 buttons don't
show any animation when I hover the mouse over them.
They work, though.
What can this be? My WinProc does nothing fancy.

Here's how I create the window.

hwnd = ::CreateWindowExA(
WS_EX_COMPOSITED
|WS_EX_LAYERED // no flicker in aero
// |WS_EX_TRANSPARENT awfully slow!
, "GLBasicDialog", caption,
WS_THICKFRAME|WS_VISIBLE | WS_SYSMENU | WS_CAPTION | WS_OVERLAPPED
|WS_MAXIMIZEBOX|WS_MINIMIZEBOX
| WS_CLIPSIBLINGS
, x,y, w, h, NULL, 0, (HINSTANCE)::GetModuleHandleA(NULL), 0);

UpdateWindow(hwnd);
ShowWindow(hwnd, SW_SHOWNORMAL);

Alf P. Steinbach

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Feb 8, 2012, 8:31:12 AM2/8/12

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I can't see anything particularly wrong. Using the ANSI wrapper
functions is unusual but should work. If you still experience the
problem after removing WS_EX_COMPOSITED|WS_EX_LAYERED then you can be
more sure that the problem is elsewhere.

I recommend:

* Create a complete, shortest possible program that exhibits the problem.

* Post the complete source code of that here.

* Also post Windows version etc.

Cheers & hth.,

- Alf

Gernot Frisch

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Feb 8, 2012, 9:00:40 AM2/8/12

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This should be reproducable:

extern "C" LRESULT CALLBACK gui_wproc(HWND hWnd, UINT uMsg, WPARAM wParam,
LPARAM lParam)
{
return DefWindowProcA(hWnd, uMsg, wParam, lParam);
}
int main()
{
WNDCLASSEX wc = {0};
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW|CS_VREDRAW; // sent WM_PAINT when size
gets changed
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hIcon = LoadIconA(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursorA(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW);
wc.hIconSm = LoadIconA(NULL, IDI_APPLICATION);
wc.lpfnWndProc = (WNDPROC) gui_wproc;
wc.hInstance = (HINSTANCE)::GetModuleHandleA(NULL);
wc.lpszClassName = "GLBasicDialog";
wc.lpszMenuName = "GLBasicDialog";

RegisterClassExA(&wc);
HWND hwnd = ::CreateWindowExA(

WS_EX_COMPOSITED|WS_EX_LAYERED // no flicker in aero

, "GLBasicDialog", "Test",

, 0,0,400,200, NULL, 0, (HINSTANCE)::GetModuleHandleA(NULL), 0);

CreateWindowExA(0, "BUTTON", "Test", BS_PUSHLIKE|BS_AUTOCHECKBOX
|WS_CHILD|WS_VISIBLE|WS_TABSTOP,
0,0,64,32,hwnd, NULL,

(HINSTANCE)::GetModuleHandleA(NULL), 0);

UpdateWindow(hwnd);
ShowWindow(hwnd, SW_SHOWNORMAL);

MSG msg;
while(GetMessage(&msg, hwnd, 0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}

Alf P. Steinbach

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Feb 8, 2012, 11:49:12 AM2/8/12

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Hm. I added include of <windows.h>, and in the window proc I added

if( uMsg == WM_CLOSE ) { PostQuitMessage( 0 ); }

(without it you should get an invisible hung process, undesirable),
plus, necessarily, changed your message loop head to

while(GetMessage(&msg, 0, 0,0))

(note second argument is 0, for all messages, instead of hwnd).

Then it works fine in Windows 7, at least when compiled by Visual C++ 10.0.

However, I did not test with menu resource.

If you're using a menu resource, please post also that.

---

Other stuff to know that might be helpful to you:

* You don't need to declare the window proc "extern "C"". In Windows
this affects only the name mangling.

* You can and should remove all the casts, e.g. (WNDPROC), except the
cast to HBRUSH.

* For the color value, add 1.

Gernot Frisch

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Feb 9, 2012, 3:23:26 AM2/9/12

to

Very strange. I added a manifest for XP+ styled theme, but it doesn't work.
I'm not using Aero - just the "Windows 7 basic" theme.

#include <Windows.h>
#include <stdio.h>

extern "C" LRESULT CALLBACK gui_wproc(HWND hWnd, UINT uMsg, WPARAM wParam,
LPARAM lParam)
{

if( uMsg == WM_CLOSE ) { PostQuitMessage( 0 ); }

return DefWindowProcA(hWnd, uMsg, wParam, lParam);
}

// ------------------------------------------------------------------------------------------
// *** MAIN ***
// ------------------------------------------------------------------------------------------

int main()
{
WNDCLASSEX wc = {0};
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW|CS_VREDRAW; // sent WM_PAINT when size
gets changed
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hIcon = LoadIconA(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursorA(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW);
wc.hIconSm = LoadIconA(NULL, IDI_APPLICATION);
wc.lpfnWndProc = (WNDPROC) gui_wproc;
wc.hInstance = (HINSTANCE)::GetModuleHandleA(NULL);
wc.lpszClassName = "GLBasicDialog";
wc.lpszMenuName = "GLBasicDialog";

RegisterClassExA(&wc);
HWND hwnd = ::CreateWindowExA(
WS_EX_COMPOSITED|WS_EX_LAYERED // no flicker in aero

// |WS_EX_TRANSPARENT awfully slow!

while(GetMessage(&msg, NULL, 0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}