关于SendMessage的问题

[czl119]

桌面上一个对话框,它上面有个按钮,
我用
n1=FindWindow("#32770",NULL);
和
n2=FindWindowEx(n1,NULL,"Button",NULL);
找到此按钮的句柄n2,
然后用
SendMessage(n2,WM_LBUTTONDOWM,NULL,NULL);

想运行程序后,按钮被按下,为什么调用SendMessage函数不起任何效果

[khpcg]

findwindowex中得参数好像需要类名啊？

[bobob]

PostMessage(n1, WM_COMMAND, MAKELPARAM(IDC_BTNID,BN_CLICKED), n2);

[DentistryDoctor]

窗口是否正确？

[fairyprince]

up

[wuchi]

没找对窗口

[legendhui]

FindWindow要用到窗口标题，对话框的类名都是#32770无法区分的
用PostMessage

[bobob]

提醒楼主：
n1=FindWindow("#32770",NULL);找到的窗口不一定是你想要的

[czl119]

#include<windows.h>

int WINAPI WinMain(HINSTANCE his,HINSTANCE he,PSTR sz,int i)
{
HWND n1,n2;
n1=FindWindow("#32770",NULL);
n2=FindWindowEx(n1,NULL,"Button"," 登录QQ");
if(n2)
{
SendMessage(n2, WM_LBUTTONDOWN, 0, 0);
//此句如换成ShowWindow(n2,SW_HIDE); 则登录按钮被隐藏,
证明n2正是那按钮的句柄,没有找错

}

return 0;
}

实际上我什么程序都没开,当前运行的程序就一个QQ对话框,所以不会找不对的,
bobob的PostMessage(n1, WM_COMMAND, MAKELPARAM(IDC_BTNID,BN_CLICKED), n2);
这句看不懂,可以解释一下吗?

[bobob]

#include<windows.h>

int WINAPI WinMain(HINSTANCE his,HINSTANCE he,PSTR sz,int i)
{
HWND n1,n2;
n1=FindWindow("#32770",NULL);
n2=FindWindowEx(n1,NULL,"Button"," 登录QQ");
if(n2)
{
PostMessage(n1, WM_COMMAND, MAKELPARAM(IDC_BTNID,BN_CLICKED), n2);
}

return 0;
}

[社会栋梁]

FindWindow("#32770",NULL);还不至于出错
你的错误是WM_LBUTTONDOWM消息发送是无效的
当鼠标在按扭上才会触发LBUTTONDOWM
用SendMessage(n2,WM_LBUTTONDOWM,NULL,NULL);是不会让它工作的
::SendMessage(n1, WM_COMMAND, MAKELPARAM(ID,BN_CLICKED),(LPARAM )n2);
才会触发

[winehero]

UP

[long_xing]

ID如何获取呢？

[bobob]

id可以用GetWindowLong得到

[threenewbee]

PostMessage()