[quote="nooc"]WM_SYSCOMMAND is send when minimizing the window. 
Check for wParam == SC_MINIMIZE in the callback.[/quote] 
Actually, I just found that 5 minutes ago and got it to work.  But, now I have another problem.  This is the code I used in my message loop: 
 
[code]case WM_SYSCOMMAND: 
        { 
            if(wParam == SC_MINIMIZE) 
            { 
                ShowWindow(hWnd, SW_HIDE); 
            } break; 
        }[/code] 
 
The window doesn't stay hidden.  It just reappears on the taskbar minimized.  Any ideas why? 
 
Edit:  I fixed that, now I have another problem :roll: 
 
The message queue seems to not respond to the CallbackMessage variable I set, so it doesn't want to tell me if I clicked on the icon or double clicked it, ect.

Edit 2:  This appears to be the case.  I read a bunch of examples on CodeProject and re-read several things on MSDN with no results.  I added a popup that will state if the tray icon sent any messages to the queue.

Here is my code if anyone is willing to take a look:
[code]// include the basic windows header file
#include <windows.h>
#include <windowsx.h>
#include <shellapi.h>
#include "resource.h"

#define WM_TRAYMESSAGE WM_APP+10

// for NOTIFYICONDATA
NOTIFYICONDATA nid;

// the WindowProc function prototype
LRESULT CALLBACK WindowProc(HWND hWnd,
                         UINT message,
                         WPARAM wParam,
                         LPARAM lParam);


// the entry point for any Windows program
int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow)
{
    // the handle for the window, filled by a function
    HWND hWnd;
    // this struct holds information for the window class
    WNDCLASSEX wc;

    // clear out the window class for use
    ZeroMemory(&wc, sizeof(WNDCLASSEX));

    // fill in the struct with the needed information
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = (WNDPROC)WindowProc;
    wc.hInstance = hInstance;
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
    wc.lpszClassName = "WindowClass1";

    // register the window class
    RegisterClassEx(&wc);

    // create the window and use the result as the handle
    hWnd = CreateWindowEx(WS_EX_NOINHERITLAYOUT,
                          "WindowClass1",    // name of the window class
                          "Window Title LAWL",   // title of the window
                          WS_OVERLAPPEDWINDOW,    // window style
                          300,    // x-position of the window
                          300,    // y-position of the window
                          500,    // width of the window
                          400,    // height of the window
                          NULL,    // we have no parent window, NULL
                          NULL,    // we aren't using menus, NULL
                          hInstance,    // application handle
                          NULL);    // used with multiple windows, NULL

    // fill the struct for NOTIFYICONDATA with the needed info
    nid.cbSize = sizeof(NOTIFYICONDATA);
    nid.hWnd = hWnd;
    nid.uID = 0;
    nid.uFlags = NIF_ICON | NIF_TIP;
    nid.uCallbackMessage = WM_TRAYMESSAGE;
    HICON hIco = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_MYICON));
    nid.hIcon = hIco;
    strncpy( nid.szTip, "App name", 64 );

    // display the window on the screen
    ShowWindow(hWnd, nCmdShow);
    Shell_NotifyIcon(NIM_ADD, &nid);

    if(hIco) { DestroyIcon(hIco); }

    // enter the main loop:

    // this struct holds Windows event messages
    MSG msg;

    // wait for the next message in the queue, store the result in 'msg'
    while(GetMessage(&msg, NULL, 0, 0))
    {
        // translate keystroke messages into the right format
        TranslateMessage(&msg);

        // send the message to the WindowProc function
        DispatchMessage(&msg);
    }

    // return this part of the WM_QUIT message to Windows
    return msg.wParam;
}

// this is the main message handler for the program
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    // sort through and find what code to run for the message given
    switch(message)
    {
        // this message is read when the window is closed
        case WM_DESTROY:
            {
                // close the application entirely
                Shell_NotifyIcon(NIM_DELETE, &nid);
                PostQuitMessage(0);
                return 0;
            } break;

         case WM_TRAYMESSAGE:
         {
             MessageBox(NULL,
               "LIAR",
               "You can't see me!",
               MB_ICONEXCLAMATION | MB_OK);
            if(LOWORD(lParam) == WM_LBUTTONUP)
            {
                Shell_NotifyIcon(NIM_DELETE, &nid);
            }
         } break;

         case WM_SIZE:
         {
             if(wParam == SIZE_MINIMIZED)
             {
                 ShowWindow(hWnd, SW_HIDE);
             }
         } break;
    }

    // Handle any messages the switch statement didn't
    return DefWindowProc (hWnd, message, wParam, lParam);
}[/code]
Yeah, it's a bit messy, but I'm trying to just get this blasted thing to work right before I do any extra work.  Take note of the dialog box.  That doesn't show up when I click the icon or put the mouse over it, or anything.

Thanks in advance if anyone has any ideas.