Thread: wM_SIZING

WM_SIZING isn't working for me. For some reason i don't recive it while
the window is being resized. I recive it after the drag is released, just like WM_SIZE.
I really have no idea, why this is happening.

I need to use this in order to limit how much can a user resize my window,
other solutions would be welcome too.

Originally Posted by MSDN

The WM_SIZING message is sent to a window that the user is resizing. By processing this message, an application
can monitor the size and position of the drag rectangle and, if needed, change its size or position.

A window receives this message through its WindowProc function.


WM_SIZING

WPARAM wParam
LPARAM lParam;
wParam
Specifies which edge of the window is being sized. This parameter can be one of the following values.
WMSZ_BOTTOM - Bottom edge
WMSZ_BOTTOMLEFT - Bottom-left corner
WMSZ_BOTTOMRIGHT - Bottom-right corner
WMSZ_LEFT - Left edge
WMSZ_RIGHT - Right edge
WMSZ_TOP - Top edge
WMSZ_TOPLEFT - Top-left corner
WMSZ_TOPRIGHT - Top-right corner
lParam
Pointer to a RECT structure with the screen coordinates of the drag rectangle. To change the size or position of
the drag rectangle, an application must change the members of this structure.

WM_SIZE should be send while the window is being dragged.

At it least it does that for me.

WM_SIZING also works just fine.

>>I need to use this in order to limit how much can a user resize my window<<

Perhaps WM_GETMINMAXINFO would be more appropriate for this.

I don't know how to use it, can you post an example?
There must be a normal & easy way to limit the resizing...

To completly stop the user from resizing your window you can simply just use the dwStyles of WS_OVERLAPPED | WS_SYSMENU in the call to CreateWindowEx

Originally Posted by r1ck0r

I just whipped this up in the reply field, untested.

Code:

WM_GETMINMAXINFO:
{
	MINMAXINFO * mmiStruct = (MINMAXINFO*)lParam;

	POINT ptPoint;

	ptPoint.x = 300;	//Minimum width of the window.
	ptPoint.y = 300;	//Minimum height of the window.
	mmiStruct->ptMinTrackSize = ptPoint;

	ptPoint.x = GetSystemMetrics(SM_CXMAXIMIZED);	//Maximum width of the window.
	ptPoint.y = GetSystemMetrics(SM_CYMAXIMIZED);	//Maximum height of the window.
	mmiStruct->ptMaxTrackSize = ptPoint;

	return 0;
}

It Works, Thanks!!!!!!