C语言实现Windows多窗体交互示例

#include<windows.h>
#include<stdlib.h>

HWND wnd,wnd1;LPCSTR ClassName="myclass", ClassName1="myclass1";
LRESULT CALLBACK MessageDeal(HWND dt,UINT uMsg,WPARAM wM,LPARAM lP){
 switch(uMsg)
 {
 case WM_KEYDOWN:MessageBox(NULL,"您按了键盘","消息",MB_OK);break;
 case WM_LBUTTONDBLCLK:MessageBox(NULL,"左键双击","消息",MB_OK);break;
 case WM_LBUTTONDOWN:MessageBox(NULL,"左键单击","消息",MB_OK);break;
 case WM_RBUTTONDOWN:MessageBox(NULL,"右键单击","消息",MB_OK);break;
 case WM_RBUTTONDBLCLK:MessageBox(NULL,"右键双击","消息",MB_OK);break;
 case WM_DESTROY:exit(0) ;break;
 //按下叉叉键产生该消息的同时会销毁窗口 
 default: return DefWindowProc(dt,uMsg,wM,lP);
 }
 return 0;
} 
//子窗口消息循环
LRESULT CALLBACK MessageDeal1(HWND dt,UINT uMsg,WPARAM wM,LPARAM lP){
switch(uMsg)
{
case WM_KEYDOWN:MessageBox(NULL,"您按了键盘1","消息",MB_OK);break;
case WM_LBUTTONDBLCLK:PostMessage(wnd,WM_LBUTTONDBLCLK,0,0);break;//不用sendmessage
case WM_LBUTTONDOWN:PostMessage(wnd,WM_LBUTTONDOWN,0,0);break;
case WM_RBUTTONDOWN:PostMessage(wnd, WM_RBUTTONDOWN,0,0);break;
case WM_RBUTTONDBLCLK:PostMessage(wnd, WM_RBUTTONDBLCLK,0,0);break;
case WM_DESTROY:PostQuitMessage (0) ;break;
//按下叉叉键产生该消息的同时会销毁窗口 
default: return DefWindowProc(dt,uMsg,wM,lP);