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Hi!
I'm new to mfc programming.
I used the wizard to create a basic application with doc/view and odbc database support. The wizard also created a menu for the frame. There are commands for record actions (for example Next Record). They are working fine, but I'd like to change the functions. I was looking for event handler codes, but I didn't find them for record actions. Where can I find the message handling for them?
Thx for your help!
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I am moving a ComboBox with:
m_cCombo.MoveWindow(x,y,w,h,TRUE);
After that the Combo does not show a Drop List.
What could be the matter 
Bram van Kampen
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I guess you broke something
I can't reproduce that on Vista - here's my test code:
CRect rct;
m_ComboBox1.GetWindowRect(&rct);
m_ComboBox1.MoveWindow(0,0,rct.Width(),rct.Height());
What are the styles of your combobox?
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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I Used the wizzard to design the Combo, VISIBLE is initially turned off, but left on for debugging. The only other Attribute set is VSCROLL. At this stage, the text is static. I move the Combo over a Listbox Item. For debugging, I immediately hide the Listbox. Combo arrives at the right location, but no Dropdown.
Since this posting, MSVC Compiler Crashed in a 'Rebuild All' (Fails to complete Browser DB)
I Killed it tru Windows Task Manager. Restarted...
Rebuild All...
This time the combo drops two lines, Has no Frame, and No Dropdown Buton.
Going to Restart the Computer and see what happens.
Thanks
Bram van Kampen
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Sounds strange! You DID break something! 
Try adding the CBS_NOINTEGRALHEIGHT style to the combobox.
If there's no items in the list, without this style
it may not drop down.
Mark Salsbery
Microsoft MVP - Visual C++
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Mark Salsbery wrote: Sounds strange! You DID break something
I know I did. Very few lines at this stage to do it in though.
Restarted the MC, No Difference. I'm going to add a TestDlg to the project, and do the same thing, and I'll let you know how I get on.
By the way:
Mark Salsbery wrote: Try adding the CBS_NOINTEGRALHEIGHT style to the combobox.
If there's no items in the list, without this style
it may not drop down.
Well the list was populated (statically) with 5 dummy items. Tried this, Made no Difference.
Regards
Bram van Kampen
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Very Strange!
Started a Test Dlg, Moved the Combo Box: No Problem.
Added a Listbox, Combo refuses to dispay on top of the ListBox.
Still displays without dropdown, or dropdown button in original code!
Bram van Kampen
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Maybe the combobox is under the list box in the z-order?
Just guessing - maybe try SetWindowPos to move the combobox
up in the z-order or make sure it's last in the dialog template.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://www.codeproject.com/script/Forums/Images/coffee.gif)
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Had thought of that, tried that, by editing the template, and by calling SetWindowpos; Makes NO difference!
It remains a Mystery!!
Regards, 
Bram van Kampen
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When you use MoveWindow on a combo box, the rectangle you supply must include teh area the drop list will be displayed to as well. When the drop list is not shown, the combo box automatically limits itself to the height of the current selection and droplist icon.
Basically, you need to change the h parameter and make it larger so the drop list will have an area to expand into when its shown.
If you vote me down, my score will only get lower
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On what OS?
It doesn't behave that way on Vista.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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In XP this appears to make no difference. Without the ListBox, the dropbox expands after moving, even if I set the height to 0. iow,I think that the Height param is ignored in this case.
thanks though, it was woth a try. 
Bram van Kampen
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Im trying to create something to resize my own GUI,
It works beautifully if i wanna shrink the think, but if i want to make the area grow it dosnt like it, im presuming its because im moving my most outside the window area but i dont know how to sort that.
so basically is how to i capture what the mouse does when it moves off the edge of my window
modified on Sunday, October 12, 2008 10:39 AM
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how would i use that
the code below is basically what i have for the mouse down, up and move ( sometimes the window dissapears and sometimes it resizes a littlebit then dissapears, im not sure what to do tbh
case WM_LBUTTONDOWN:
if(
{
SetCapture(hWnd);
mResize = TRUE;
}
break;
case WM_LBUTTONUP:
{
ReleaseCapture();
mResize = FALSE;
}
break;
case WM_MOUSEMOVE:
{
if(wParam == MK_LBUTTON) && mResize)
{
RECT rcWnd;
POINT pnt, pntDiff;
GetCursorPos(&pnt);
GetWindowRect(hWnd, &rcWnd);
DeleteObject(hRegion2);
DeleteObject(hRegion1);
pntDiff.x = pnt.x - rcWnd.right;
nWidth = nWidth + (int)pntDiff.x;
pntDiff.y = pnt.y - rcWnd.bottom;
nHeight = nHeight + (int)pntDiff.y;
MoveWindow(hWnd,rcWnd.left, rcWnd.top, nWidth, nHeight, TRUE);
HRGN hRegion1 = CreateRectRgn(0, 0, nWidth, nHeight);
HRGN hRegion2 = CreateRectRgn(0, 0, nWidth, nHeight);
CombineRgn(hRegion1, hRegion1, hRegion2, RGN_OR);
SetWindowRgn(hWnd, hRegion1, true);
UpdateWindow(hWnd);
}
}
break;
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OOpsie! 
Did you realise you're changing the size of the regions every time the major block of code in the WM_MOUSEMOVE message is processed?
What are nWidth & nHeight to begin with?
Since you can't click below or to the right of your window, pntDif.x & pntDif.y are always going to be negative. By adding these to the (unknown) values of nWidth & nHeight, you are rewarded with a window that shrinks.
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well my nWidth and nHeight are global variables with the form/region and bitmap use to create my GUI
initially set to 506x376.
i dont know much on how to resize it, which is annoying cause it should be straight forward math
basically i have the width and the height, i have it set to check whether the mouse is in the bottom corner (which works)
and when i click on it and drag it outwards, i want it to resize with it like a normal window would do,
but eitherway its causing major problems lol, i managed to get it working when i clicked and dragged and the resize would happen on WM_LBUTTONUP but that didnt give a sizing/growing effect with it, and additionally i dont know how to stretch the skin out either(i didnt particulaly want to do it with multiple pictures and layers lol so any help would be really good, if i could send the actual code to someone that would be better and they could take a look whats wrong but all i can give is bits at the time atm
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Yeah sure, I'll have a look at the code as long as it's not MFC, as I don't have it.
enhzflep at yahoo dot com dot au
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Changes to your code marked in red...
<code>POINT AnchorPoint;</code>
...
case WM_LBUTTONDOWN:
if(
{
SetCapture(hWnd);
mResize = TRUE;
<code>::GetCursorPos(&AnchorPoint);</code>
}
break;
case WM_LBUTTONUP:
{
<code>if (mResize)
{</code>
ReleaseCapture();
mResize = FALSE;
<code>}</code>
}
break;
case WM_MOUSEMOVE:
{
if(wParam == MK_LBUTTON) && mResize)
{
<code>POINT newPoint;
::GetCursorPos(&newPoint);
if (newPoint.x != AnchorPoint.x || newPoint.y != AnchorPoint.y)
{
RECT rcWnd;
::GetWindowRect(hWnd, &rcWnd);
rcWnd.right += (newPoint.x - AnchorPoint.x);
rcWnd.bottom += (newPoint.y - AnchorPoint.y);
::MoveWindow(hWnd, rcWnd.left, rcWnd.top, rcWnd.right-rcWnd.left, rcWnd.bottom-rcWnd.top, TRUE);
AnchorPoint = newPoint;
}</code>
}
}
break;
Mark Salsbery
Microsoft MVP - Visual C++
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Also...
When you handle any of those messages, you should also return 0 to
indicate you've handled the message instead of passing it on to the
default window proc (if that's what you are doing).
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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That code works for forms without regions being used, as i have my own GUI i also have HRGN, which practically covers the window, a bitmap ontop of that AND transparency lol which allows me to shape my form and have nice round edges so given the HRGN how would i get that to work with it
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That's fine - the idea was to show you working code.
In your code sample, you delete two regions on every mousemove message.
Who creates those regions?
You DO know you are not supposed to delete a region you've used in SetWindowRgn(), right?
You also create two identical new regions and OR them together (???) on
every mousemove message. You use local variables for those so if you think you are
destroying them later, you are wrong.
You didn't show any code that does anything with transparency or
"shape my form and have nice round edges" so it's hard to give you an
example that does what you are doing (or trying to do)
It's also impossible to tell what might be wrong...
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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well if i showed my working code it would kinda fill up most of this forum and posting a lot of code in here tends to be tedious
as far as the questions go
as far as knowing im not supposed to delete regions ive used in setWindowRgn, no i did not know but i do know, which kinda begs the question how to you resize a region without destroying it or setting a new windowrgn.
again as far as identical local variables i didnt actually think it would matter in this trial run but also again i was wrong lol
so begs the question given my own GUI and region how would i resize it lol
The regions used are below  along with the definitions and most of the skining stuff
at the top with the beloved variables I have
#define LWA_COLORKEY 0x00000001
#define LWA_ALPHA 0x00000002
#define g_ColourKey 0xFF00FF // 255,0,255(pink) in hex RGB
#define WS_EX_LAYERED 0x00080000
#define IDB_CLOSEWINDOW 1000
typedef BOOL (WINAPI *lpfnSetLayeredWindowAttributes)(HWND hWnd, COLORREF crKey, BYTE bAlpha, DWORD dwFlags);
lpfnSetLayeredWindowAttributes SetLayeredWindowAttributes;
int nWidth = 506;
int nHeight = 376;
BOOL mDown = FALSE;
POINT AnchorPoint;
the initial regions are create at the top of WndProc and are used in WM_CREATE
LRESULT CALLBACK WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
DWORD dwStyle = GetWindowLong(hWnd, GWL_STYLE);
HRGN hRegion1 = CreateRectRgn(0, 0, nWidth, nHeight);
HRGN hRegion2 = CreateRectRgn(0, 0, nWidth, nHeight);
switch(Msg)
{
case WM_CREATE:
g_Hwnd = hWnd;
dwStyle &= ~(WS_CAPTION|WS_SIZEBOX);
SetWindowLong(hWnd, GWL_STYLE, dwStyle);
CombineRgn(hRegion1, hRegion1, hRegion2, RGN_OR);
SetWindowRgn(hWnd, hRegion1, true);
SetWindowLong(hWnd, GWL_EXSTYLE, GetWindowLong(hWnd, GWL_EXSTYLE) | WS_EX_LAYERED);
SetLayeredWindowAttributes(hWnd, g_ColourKey, 0, LWA_COLORKEY);
m_hCloseButton = CreateWindow("BUTTON",
"x",
WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON | BS_CENTER | BS_FLAT,
nWidth-28, (nHeight-nHeight+10), 20, 20,
hWnd,
(HMENU)IDB_CLOSEWINDOW,
hInst,
NULL);
WM_PAINT calls a function called skin() which is below
BOOL Skin() {
HBITMAP hSkinBmp = LoadBitmap(hInst,MAKEINTRESOURCE(IDB_MAIN));
if (!hSkinBmp) return -1;
HDC dcSkin = CreateCompatibleDC(0);
HBITMAP hOldBmp = (HBITMAP)SelectObject(dcSkin, hSkinBmp);
PAINTSTRUCT ps;
BeginPaint(g_Hwnd,&ps);
BitBlt(ps.hdc, 0, 0, nWidth, nHeight, dcSkin, 0,0, SRCCOPY);
EndPaint(g_Hwnd,&ps);
return 0;
}
and as far as the mouse move well you have all that and i may aswel delete most of it and start again lol
WinMain is just the standard create you own Win32 API window
so any help would be had  lol as you can tell im a n00b trying to learn API and not having too much success
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Okay, I've had a look at your code Sarriss, and the one thing that strikes me more than anything is the approach you've taken.
Typically, whenever a resizeable box with rounded corners is drawn, it is drawn using 9 images - top left corner, top middle, top right corner, right middle, middle-middle, right-middle, bot left corner, bot middle, bot right corner.
Doing so means that the corner pieces are always drawn at the correct scale and that the window is sized by stretching all pieces except the corner images.
In your case, it'll be not quite that simple since the bar across the top of the window isn't of uniform height. You may need 5 images to cover the top - the two corners, the low part, the high part and the transition between the two. To make the window wider, you'd just stretch the high part and/or the low part, while drawing the corners and the transition at 1:1 scale.
If you've not seen it, you may like to take look at this.[^]
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Thnx, will take a look at the picture thing i knew kind of that i would need a lot of pictures was more trying to get the window to resize first and making sure i had the resize of the window but i will take a look at the link you gave me, might give me more ideas lol
and also given that i have two levels at the top pic couldnt i just have a bigger corner piece in the corner and then have the otherone plus the pink bit that isnt showing.
also how do you scale/stretch the pictures :S been looking for that for like ages
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