Hi, I'm drawing on a topmost semitransparent Window. I'd draw rectangle with transparent background. I tried: rec.Fill = new SolidColorBrush(Color.FromArgb(0, 255, 255, 255)); canvas.Children.Add(rec); but doesn't work. How can I do?

Hi all, how can I check if window is hidden by another window? I tried IsWindowVisible but doesn't work.

I use EnumWindows, the problem is that more than one windows pass the check(point in rect). How can I determine the right window on which lies the mouse?

I don't know how perform hit test without hiding my window...

because with visual tree I can handle only the windows that own to my application, but under the mouse cursor there may be a window of any application running on desktop.

The main problem is to get the hwnd of the window immediately under my wpf topmost Window.

Hi all, I've a transparent topmost window, I need on mouse move to highlight the window under the cursor I tried so in mouse_move_handler:

...
this.Hide();
hWnd = Win32.WindowFromPoint(p);
this.Show();
...
Win32.GetWindowRect(hWnd, ref rc);
and so on drawing rectangle
...

this code works, but I can't avoid flicker. There is some alternative way to do this?

hi, how can i get all the windows handle from a point? For example if in (100,100) i have two windows overlapped, i want to get the handle of the topmost window and the handle of the other window.

I'm not using MFC. So i've to call SetWindowSubclass function and set my own EditProc in which handle WM_CONTEXTMENU?

How can i add a context menu to an edit control? I try to handle WM_RBUTTONDOWN in the main window, but don't work if the mouse click is on the edit control.

Hi, I've a modal dialog box and I've tried to set a bitmap background:

case WM_ERASEBKGND:
{
HDC memDC, hdc;
HBITMAP hBmp;
BITMAP bmp;
RECT rcc;

hdc = GetDC(hDlg);
hBmp = LoadBitmap(hInst, MAKEINTRESOURCE(IDB_BMP));
memDC = CreateCompatibleDC(hdc);

SelectObject(memDC,hBmp);
GetObject(hBmp, sizeof(bmp), &bmp);
GetClientRect(hDlg,&rcc);

SetStretchBltMode(hdc, HALFTONE);
StretchBlt(hdc,
0,0, rcc.right,rcc.bottom,
memDC,
0,0,bmp.bmWidth, bmp.bmHeight,
SRCCOPY);

DeleteDC(memDC);
DeleteObject(hBmp);
ReleaseDC(hDlg,hdc);

return (INT_PTR)TRUE;
}

this code set a background bitmap, but when I move or resize the dialog controls(edit,button,listbox,...) disappear under the bitmap...what's wrong?how can i repaint correctly the dialog?

I know but don't work in that way!

no because with BS_BITMAP style show bitmap only without text in the button. I need [Bitmap+Text]

not NULL

but is it possible to add an image with BM_SETIMAGE without ownerdraw button?

Hi, I want to add a bitmap to a button in my DialogBox. The code is:

case WM_INITDIALOG:

hBmp = LoadBitmap(hInst, MAKEINTRESOURCE(IDB_QUIT));
SendMessage(GetDlgItem(hDlg,ID_QUIT),BM_SETIMAGE,(WPARAM)IMAGE_BITMAP,(LPARAM)hBmp);

return (INT_PTR)TRUE;

but why don't work?

I draw a bitmap in the window client area

case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
memDC = CreateCompatibleDC(hdc);
SelectObject(memDC,hbmp);
GetObject(bmp, sizeof(bm), &bm);
GetClientRect(hWnd,&rcc);

BitBlt(hdc,
0,0, rcc.right,rcc.bottom,
memDC,
0,0,SRCCOPY);

If the the bitmap is bigger than the client area how can i implement VSCROLL and HSCROLL?

In my program I have a MainThread and more WorkerThread. Suppose that at certain event (which I'll manage) the MainTh must send a string (char []) to all WorkerTh, which will then process the request and send a response to MainTh. What methods provided by windows are more suitable to handle a similar thing?

InvalidateRect doesn't work, the screen is still dirty.

Hi, I'm trying to draw a rectangle on the screen with MouseHook, but i can't:

LRESULT CALLBACK MouseProc(int nCode,WPARAM wParam,LPARAM lParam)
{
LPMOUSEHOOKSTRUCT info=(LPMOUSEHOOKSTRUCT) lParam;
static BOOL capturing = 0;
Pen p(Color(255,255,0,0),5);
Graphics g(GetDC(0));

switch(wParam)
{
case WM_LBUTTONDOWN:
capturing = TRUE;
rcCaptured.left = info->pt.x;
rcCaptured.top = info->pt.y;
break;
case WM_LBUTTONUP:
if( capturing )
{
rcCaptured.right = info->pt.x;
rcCaptured.bottom = info->pt.y;
capturing = FALSE;
}
break;
case WM_MOUSEMOVE:
InvalidateRect(GetDesktopWindow(),NULL,FALSE);
g.DrawRectangle(&p,rcCaptured.left,rcCaptured.top,info->pt.x-rcCaptured.left,info->pt.y-rcCaptured.top);
break;
}
}

how can force repaint of the screen? and how remove hook after select a rectangle?