error C2065: 'WM_MOUSELEAVE' : undeclared identifier怎么回事？帮帮忙吧？

[coffeemlx]

// Test32.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "resource.h"
#include"stdio.h"
/*BOOL callback theProc(
HWND hwndDlg,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
);
*/
BOOL CALLBACK theProc(
HWND hwndDlg, // handle to dialog box
UINT uMsg, // message
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
)

{
switch (uMsg)
{
case WM_INITDIALOG:
MoveWindow(hwndDlg,100,80,200,250,FALSE);
SetWindowText(hwndDlg,"测试窗口标题");
return TRUE;
case WM_COMMAND:
switch(LOWORD (wParam))
{
case IDOK:
case IDCANCEL:
EndDialog(hwndDlg,wParam);
return TRUE;
}
break;
case WM_LBUTTONDOWN:
{
int x = LOWORD(lParam);
int y = HIWORD(lParam);
char s[200];
sprintf(s,"x = %d,y = %d",x,y);
MessageBox(hwndDlg,s,"提示",0);
}
return TRUE;
case WM_MOUSELEAVE:


{
int x = LOWORD(lParam);
int y = HIWORD(lParam);
char s[200];
sprintf(s,"x = %d,y = %d",x,y);
SetWindowText(hwndDlg,s);
}

return TRUE;

}
return FALSE;
}

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
int nRet = DialogBox(hInstance,(LPCTSTR)IDD_MAIN_DLG,NULL,theProc);

return 0;
}

error C2065: 'WM_MOUSELEAVE' : undeclared identifier怎么回事？帮帮忙吧？

[schlafenhamster]

#define WM_MOUSEHOVER 0x02A1 #define WM_MOUSELEAVE 0x02A3 see commctrl.h

[coffeemlx]

本人新手 能说的 在明白些吗？

[coffeemlx]

谢谢 二楼 已经解决了！！！#include <commctrl.h>

[schlafenhamster]

1. 加 #define WM_MOUSEHOVER 0x02A1 #define WM_MOUSELEAVE 0x02A3 2. #include <commctrl.h>