C / C++ / MFC

Re: CALLBACK function not being called

20-Dec-02 2:59

hello, i have a callback MouseProc function that's not being called, what's wrong? thanks
LRESULT CALLBACK MouseProc(int nCode, WPARAM wParam, LPARAM lparam){
ofstream output1("debug.txt",ios::out);
output1.write("hello",strlen("hello"));
output1.close();
return -1;

}
HOOKPROC hookproc = (HOOKPROC)GetProcAddress(hInstance, "MouseProc");
SetWindowsHookEx(WH_MOUSE, hookproc,hInstance,GetCurrentThreadId());

the following is the main function in detail:
int PASCAL WinMain(HINSTANCE hInstance, HINSTANCE hPrev, LPSTR lpCmdLine, int Cmd) {

MSG msg;

// Setup and register the window class;

WNDCLASS wClass;
wClass.style =CS_HREDRAW|CS_VREDRAW;
wClass.lpfnWndProc =WindowProcedure; // callback-function;
wClass.cbClsExtra =0;
wClass.cbWndExtra =0;
wClass.hInstance =hInstance;
wClass.hIcon =LoadIcon(hInstance,IDI_APPLICATION);
wClass.hCursor =LoadCursor(NULL,IDC_ARROW);
wClass.hbrBackground =(HBRUSH)(COLOR_WINDOW+3);
wClass.lpszMenuName =NULL;
wClass.lpszClassName =WINDOWNAME;

RegisterClass(&wClass);

// Create the window and store the handle;

hWnd = CreateWindow(WINDOWNAME, // class name;
WINDOWNAME, // window name;
WS_OVERLAPPEDWINDOW, // window style;
CW_USEDEFAULT, CW_USEDEFAULT, // starting position (x,y);
320, 240, // width and height;
NULL, // parent handle;
NULL, // menu handle;
hInstance, // instance handle;
NULL); // other parameters;

// Check if window creation failed; otherwise show and update;

if(hWnd==NULL) return FALSE;
else {

ShowWindow (hWnd, Cmd);
UpdateWindow(hWnd);
//HWND prevWind=SetCapture(hWnd);
//cerr<<"previous window is "<

Rage20-Dec-02 3:22

Re: CALLBACK function not being called

20-Dec-02 3:22

Is hookproc valid ?

~RaGE();

king_of_the_world20-Dec-02 12:02

Getting Print Dialog colour settings and resetting DIB pallette

20-Dec-02 12:02

i believe it is, but maybe not.... that's why I'm asking the question..

Anonymous20-Dec-02 2:55

Anonymous

20-Dec-02 2:55

I'm using a DIB and StretchDIBits to print a bitmap to various printers. My problem is that, when I'm printing to a printer that supports only black & white only the very dark colours are visible in the printout. I'm not sure how to, first of all check for printer colour settings and secondly how to then set up the Pallette to support black & white settings. Confused | :confused:

Is there anyone who can offer any advice. Even pointing me in the right direction will be much appreciated.

ifstream not found in <iostream>

king_of_the_world20-Dec-02 2:34

20-Dec-02 2:34

I'm trying to use ifstream under vc++ 6.0, it was not found.
I did #include<iostream> or #<iostream.h> and i looked at the iostream.h, nowhere was ifstream to be found. what's going on????
thanx

king_of_the_world20-Dec-02 2:36

20-Dec-02 2:36

nevermind it's in fstream.h, my bad, I'm new to c++

Rage20-Dec-02 2:54

20-Dec-02 2:54

Well, with such a nickname, we had expected a little bit more from you Poke tongue | ;-P

~RaGE();

king_of_the_world20-Dec-02 3:01

20-Dec-02 3:01

hehe the king of the world doesn't know c++, I doubt any king knew c++ :P

Tim Smith20-Dec-02 3:42

Tim Smith

20-Dec-02 3:42

king_of_the_world ...

Hmm, that would be upper management. They usually don't know anything useful. Smile | :)

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Lock an Object of CWnd (MFC)

Jeff J20-Dec-02 10:28

Jeff J

20-Dec-02 10:28

Tim Smith wrote:
Hmm, that would be upper management. They usually don't know anything useful.

I don't understand. You said "usually", have you found an exception to the rule? If so, rest assured that such an anomaly will not last for long!

Alex H 198320-Dec-02 1:30

Alex H 1983

20-Dec-02 1:30

i Creat an Object of CWnd (i name it cw) and Draw it in the main Window (this) and then i draw a bitmap in the cw.

my problem is when i draw a line in the main window that line affect cw and it's contents.
and then i have to cw->RedrawWindow(); to get the Real appearence back.

is there any way to Lock an Object of CWnd or do something to Stop this.

Re: Lock an Object of CWnd (MFC)

Joaquín M López Muñoz20-Dec-02 3:37

Joaquín M López Muñoz

20-Dec-02 3:37

Try setting the style "Clip children" in the resource editor for yor main window (or if it is not a dialog, set the style WS_CLIPCHILDREN when creating the window).

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

dialog app

Raphael Kindt20-Dec-02 1:05

Raphael Kindt

20-Dec-02 1:05

Hi
I open a simple modal dialog box... (from a menu)
And I want to do this:
When the mouse cursor move above a simple component (CEdit, CCheckBox, CComboBox, etc.), I want to display some information about this component fonctionnality (CEdit, etc.) in CEdit with the read-only flag...
The WM_MOUSEMOVE message is sent to the dialog box. Here is the code I use:

void CControlDlg::OnMouseMove(UINT nFlags, CPoint point) 
{
	CWnd* ThisWnd = ChildWindowFromPoint(point);
	int ThisID = ThisWnd->GetDlgCtrlID();

	switch(ThisID) {
	case IDC_TPG_V_H:
		m_strInfoControl = "Test Pattern Generator for incremental test";
		break;
	//
	// + some other case for different component information
	//
	default:
		m_strInfoControl = "default";
	}
	UpdateData(FALSE);
	CDialog::OnMouseMove(nFlags, point);
}

The m_strInfoControl is the information display into an Edit box read-only component...
The problem is that the dialog box loses the control of the mouse when the mouse cursor is above a component...

Thanks in advance...

Hello World!!! Smile | :)

from Raphaël

Rage20-Dec-02 1:26

20-Dec-02 1:26

You could compare the coords or the cursor (the point parameter of OnMouseMove) with the CRect coords of the control with CRect::PtInRect ... Unsure | :~

?

[EDIT] I might have not understand your question : Is it you can't recognize the control where the mouse cursor passes over, or is it you cannot do anything after you recognized it ?

~RaGE();

Raphael Kindt20-Dec-02 1:36

Raphael Kindt

20-Dec-02 1:36

This is: I can't recognize the control where the mouse cursor passes over...
Because OnMouseMove is defined for the dialog and not for the component i want to recognize...

Hello World!!! Smile | :)

from Raphaël

Rage20-Dec-02 2:18

20-Dec-02 2:18

You'll have to override the OnMouseMove for every control, or do almost like I said in the first post (that's bad cheating): Get the CRect from your control, add it 10 pixels or so on every side, so you'll egt a CRect 10 pixels greater than your control, and when the mouse enter this CRect, display your things, when it comes out, undo your display. Tricky, but it should do it. You may also take a look on OnSetCapture to redirect Mouse events.

~RaGE();