办公室通过路由器上网，所以不能直接远程桌面登录到自己计算机上，办公室的人都想在宿舍登录到自己的计算机上工作学习，所以可以简单的将路由器的3389端口(windows远程桌面默认使用3389端口)映射到自己的IP上，同时修改其他人计算机的远程桌面端口，然后再相应的将路由器端口映射到自己的IP上即可。
修改远程桌面端口需要修改注册表中的两个值：
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal
Server\WinStations\RDP-Tcp]
“PortNumber”=dword:00000d3d
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal
Server\Wds\rdpwd\Tds\tcp]
“PortNumber”=dword:00000d3d
修改两个值，十进制是0-65535，双字十六进制是0x00000000-0x0000FFFF，推荐修改为1024以上。
如何使用windows api编写一个小程序来修改端口呢？接下来就详细的讲讲这个程序应该如何实现，另外在讨论一下如何使用windows api编写简单的windows程序。
下载开源的windows api集成开发环境Code::Blocks
(访问Code::Blocks主页)
建议下载集成mingw的CodeBlocks，这样就不用单独下载安装mingw了，如果不知道什么是mingw，赶紧google一下看看吧。配置好开发环境后，就可以开始下一步啦。
启动Code::Blocks，然后新建一个Win32 GUI Project，这样IDE会自动构建一个对话框，而且程序的基本结构也就构造好了。程序的入口就是WinMain函数，然后就可以在这个基础之上编写我们的程序了。
先确定这个程序有几个窗口，然后修改resource.rc文件，资料都可以去MSDN查找
resource.rc
1
#include “resource.h”
2
3
DLG_MAIN DIALOGEX 6,6,269,131
4
STYLE 0x90CC0800
5
CAPTION “远程桌面连接端口修改器”
6
FONT 8,“MS Sans Serif”,0,0
7
BEGIN
8
CONTROL
“",IDC_EDT,“Edit”,0x50010000,72,51,170,13,0x00000200
9
CONTROL
“十进制(&D)",IDC_RBN_D,“Button”,0x50010009,20,81,54,9
10
CONTROL
“十六进制(&H)",IDC_RBN_H,“Button”,0x50010009,90,81,60,9
11
CONTROL
“二进制(&B)",IDC_RBN_B,“Button”,0x50010009,164,81,54,9
12
CONTROL
“修改(&E)",IDC_BTN_E,“Button”,0x50010000,14,107,54,13
13
CONTROL
“还原(&B)",IDC_BTN_B,“Button”,0x50010000,70,107,54,13
14
CONTROL
“关于(&A)",IDC_BTN_A,“Button”,0x50010000,126,107,54,13
15
CONTROL
“退出(&Q)",IDC_BTN_Q,“Button”,0x50010000,198,107,54,13
16
CONTROL
“远程桌面端口”,IDC_STC,“Static”,0x50000000,16,53,52,9
17
CONTROL
“基数”,IDC_GRP,“Button”,0x50000007,14,70,228,24
18
CONTROL
“#1013”,IDC_IMG,“Static”,0x5000020E,0,0,271,44
19
END
20
ICON_LOH ICON DISCARDABLE “rd.ico”
21
BMP_HEAD BITMAP DISCARDABLE
“head.bmp”
22
23
IDD_DLG_ABOUT DIALOGEX 55,25,151,55
24
CAPTION “关于”
25
FONT 8,“MS Sans Serif”,0,0
26
STYLE 0x90CC0000
27
BEGIN
28
CONTROL
“#1012”,IDC_IMG_ABOUT,“Static”,0x50000203,14,11,20,19
29
CONTROL
“远程桌面链接端口修改器\[email protected]”,IDC_STC_ABOUT,“Static”,0x50000000,42,11,94,20
30
CONTROL
“确定”,IDC_BTN_ABOUT,“Button”,0x50010000,106,38,40,13
31
END
32
resource.rc文件很简单，包括两个对话框，同时对话框里包括了一些简单的控件。
修改resource.h文件，在其中添加一些控件的预定义
resource.h
1
#include <windows.h>
2
3
// ID of Main Dialog
4
#define DLG_MAIN 1000
5
6
// ID of Button Controls
7
#define IDC_GRP 1003
8
#define IDC_STC 1001
9
#define IDC_EDT 1002
10
#define IDC_RBN_H 1004
11
#define IDC_RBN_D 1005
12
#define IDC_BTN_E 1006
13
#define IDC_BTN_B 1007
14
#define IDC_BTN_Q 1008
15
#define IDC_BTN_A 1009
16
#define IDC_IMG 1010
17
#define IDC_RBN_B 1011
18
#define ICON_LOH 1012
19
#define BMP_HEAD 1013
20
21
//About Dialog
22
#define IDD_DLG_ABOUT 1017
23
#define IDC_STC_ABOUT 1014
24
#define IDC_BTN_ABOUT 1015
25
#define IDC_IMG_ABOUT 1016
26
编写一些简单的工具函数，主要实现2进制、10进制和16进制之间的相互转换，和一些输入的校验。这个程序做的不是很完善，没有校验一些输入数据。
这里是utils.h文件(H代表16进制，D代表10进制，B代表2进制)
utils.h
1
#ifndef UTILS_H_INCLUDED
2
#define UTILS_H_INCLUDED
3
4
#define H 16
5
#define D 10
6
#define B 2
7
8
#define RD_FALSE 0
9
#define RD_TRUE 1
10
11
///格式转换/
12
char * strReverse(char *);
13
char * DtoDstr(int);
14
int CommontoD(char *, int);
15
16
char * HtoD(char *);
17
char * BtoD(char *);
18
19
char * HtoB(char *);
20
char * DtoB(char *);
21
22
char * BtoH(char *);
23
char * DtoH(char *);
24
25
///格式检查/
26
int HFormatCheck(char *);
27
int BFormatCheck(char *);
28
int DFormatCheck(char *);
29
30
#endif // UTILS_H_INCLUDED
31
这里是utils.c文件
utils.c
1
#include <stdio.h>
2
#include <stdlib.h>
3
#include <string.h>
4
#include <math.h>
5
#include “utils.h”
6
7
//字符串逆序
8
char * strReverse(char str)
9
{
10
int i,j,len = strlen(str);
11
char * res = (char)malloc(len
- 1);
12
memset(res, 0, len + 1);
13
for(i = len - 1, j = 0; i >= 0; i --, j
++)
{
14
res[j] = str[i];
15
}
16
return res;
17
}
18
19
//2，16进制转10进制
20
int CommontoD(char *pC, int factor)
21
{
22
pC = strReverse(pC);
23
int d_res = 0;
24
int d_num = 0;
25
int i;
26
for(i = strlen(pC) - 1; i >= 0;
i --)
27
{
28
if(pC[i] >= ‘0’ && pC[i] <= ‘9’)
{
29
d_num = pC[i] - ‘0’;
30
}
31
if(pC[i] >= ‘a’ && pC[i] <= ‘f’)
{
32
d_num = pC[i] - 87;
33
}
34
if(pC[i] >= ‘A’ && pC[i] <= ‘F’)
{
35
d_num = pC[i] - 55;
36
}
37
d_res += d_num * pow(factor,
i);
38
}
39
return d_res;
40
}
41
42
//将10进制数转为字符串
43
char * DtoDstr(int d_num)
44
{
45
char d_str = (char)malloc(6);
46
memset(d_str,0,6);
47
int i = 0;
48
while(d_num > 0)
49
{
50
d_str[i++] = (d_num % 10) +
‘0’;
51
d_num /= 10;
52
}
53
return strReverse(d_str);
54
}
55
//二进制到十进制
56
char * BtoD(char *pB)
57
{
58
return DtoDstr(CommontoD(pB,
B));
59
}
60
61
//十六进制到十进制
62
char * HtoD(char *pH)
63
{
64
return DtoDstr(CommontoD(pH,
H));
65
}
66
67
68
//十进制到二进制
69
char * DtoB(char *pD)
70
{
71
//65535用16个1表示
72
//开17个就够了
73
char b_str =
(char)malloc(17);
74
memset(b_str,0,17);
75
int d_num = atoi(pD);
76
int i = 0;
77
while(d_num > 0)
{
78
b_str[i++] = (d_num % 2) + ‘0’;
79
d_num /= 2;
80
}
81
return strReverse(b_str);
82
}
83
84
//十六进制转二进制
85
char * HtoB(char *pH)
86
{
87
return DtoB(HtoD(pH));
88
}
89
90
//十进制到十六进制
91
char * DtoH(char *pD)
92
{
93
//65535用4个f表示
94
//开5个就够了
95
char h_str = (char)malloc(5);
96
memset(h_str,0,5);
97
int d_num = atoi(pD);
98
int bit;
99
int i = 0;
100
while(d_num > 0)
{
101
bit = d_num % 16;
102
if(bit >= 0 && bit <= 9)
{
103
h_str[i++] = bit + ‘0’;
104
}
105
else
{
106
h_str[i++] = bit + 87;
107
}
108
d_num /= 16;
109
}
110
return strReverse(h_str);
111
}
112
113
//二进制转十六进制
114
char * BtoH(char *pB)
115
{
116
return DtoH(BtoD(pB));
117
}
118
119
//检查16进制数是否合法
120
int HFormatCheck(char *pH)
121
{
122
if(pH == NULL)
{
123
return RD_FALSE;
124
}
125
126
int len = strlen(pH);
127
int i;
128
for(i = 0; i < len; i ++)
129
{
130
if(!((pH[i] >= ‘0’ && pH[i] <=
‘9’) || (pH[i] >= ‘a’ && pH[i] <= ‘f’) || (pH[i] >= ‘A’ && pH[i] <= ‘F’) ))
131
{
132
return RD_FALSE;
133
}
134
}
135
return RD_TRUE;
136
}
137
//检查2进制数是否合法
138
int BFormatCheck(char *pH)
139
{
140
if(pH == NULL)
{
141
return RD_FALSE;
142
}
143
144
int len = strlen(pH);
145
int i;
146
for(i = 0; i < len; i ++)
147
{
148
if(!(pH[i] >= ‘0’ && pH[i] <=
‘1’))
149
{
150
return RD_FALSE;
151
}
152
}
153
return RD_TRUE;
154
}
155
156
//检查10进制数是否合法
157
int DFormatCheck(char *pH)
158
{
159
if(pH == NULL)
{
160
return RD_FALSE;
161
}
162
163
int len = strlen(pH);
164
int i;
165
for(i = 0; i < len; i ++)
166
{
167
if(!(pH[i] >= ‘0’ && pH[i] <=
‘9’))
168
{
169
return RD_FALSE;
170
}
171
}
172
return RD_TRUE;
173
}
174
175
176
最后是主程序main.c
main.c
1
#include <windows.h>
2
#include <stdio.h>
3
#include <stdlib.h>
4
5
#include “utils.h”
6
#include “resource.h”
7
8
HINSTANCE hInst;
9
HICON hIcon;
10
int id_pre_checked;
11
int port;
12
char *buf;
13
14
//两个注册表
15
HKEY winstations;
16
HKEY wds;
17
18
//获得十进制的数
19
int GetPortNumber(char *port, int
IDC)
20
{
21
//char * res;
22
if(IDC == IDC_RBN_D)
23
{
24
return atoi(port);
25
}
26
if(IDC == IDC_RBN_H)
27
{
28
return atoi(HtoD(port));
29
}
30
if(IDC == IDC_RBN_B)
31
{
32
return atoi(BtoD(port));
33
}
34
return -1;
35
}
36
37
//关于窗口
38
BOOL CALLBACK AboutDialogProc(HWND
hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
39
{
40
switch(uMsg)
41
{
42
case WM_INITDIALOG:
43
SendMessage(hwndDlg,WM_SETICON,ICON_BIG,(LPARAM)hIcon);
44
//SendMessage(hwndDlg,WM_SETICON,ICON_SMALL,(LPARAM)hIcon);
45
return TRUE;
46
case WM_CLOSE:
47
EndDialog(hwndDlg, 0);
48
return TRUE;
49
50
case WM_COMMAND:
51
switch(LOWORD(wParam))
52
{
53
case IDC_BTN_ABOUT:
54
EndDialog(hwndDlg, 0);
55
return TRUE;
56
}
57
}
58
return FALSE;
59
}
60
61
//主窗口
62
BOOL CALLBACK DialogProc(HWND
hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
63
{
64
switch(uMsg)
65
{
66
case WM_INITDIALOG:
67
//设置十进制是选中状态
68
CheckRadioButton(hwndDlg,IDC_RBN_D,IDC_RBN_B,IDC_RBN_D);
69
id_pre_checked = IDC_RBN_D;
70
buf = (char *)malloc(20);
71
72
//打开注册表
73
RegOpenKeyEx(HKEY_LOCAL_MACHINE,“SYSTEM\\CurrentControlSet\\Control\\Terminal
Server\\Wds\\rdpwd\\Tds\\tcp”,0,KEY_ALL_ACCESS,&wds);
74
RegOpenKeyEx(HKEY_LOCAL_MACHINE,“SYSTEM\\CurrentControlSet\\Control\\Terminal
Server\\WinStations\\RDP-Tcp”,0,KEY_ALL_ACCESS,&winstations);
75
76
//读取注册表的值
77
DWORD value = 0;
78
DWORD dwType = REG_DWORD;
79
DWORD dwSize = sizeof(DWORD);
80
RegQueryValueEx(wds,“PortNumber”,NULL,&dwType,(LPBYTE)&value, &dwSize);
81
82
SetDlgItemText(hwndDlg,IDC_EDT,DtoDstr(value));
83
84
//加载图标
85
hIcon =
LoadIcon(hInst,(LPCTSTR)ICON_LOH);
86
SendMessage(hwndDlg,WM_SETICON,ICON_BIG,(LPARAM)hIcon);
87
//SendMessage(hwndDlg,WM_SETICON,ICON_SMALL,(LPARAM)hIcon);
88
return TRUE;
89
90
case WM_CLOSE:
91
EndDialog(hwndDlg, 0);
92
RegCloseKey(wds);
93
RegCloseKey(winstations);
94
return TRUE;
95
96
case WM_COMMAND:
97
switch(LOWORD(wParam))
98
{
99
case IDC_BTN_Q:
100
EndDialog(hwndDlg, 0);
101
return TRUE;
102
103
case IDC_BTN_E:
104
memset(buf,0,20);
105
GetDlgItemText(hwndDlg,IDC_EDT,buf,19);
106
port =
GetPortNumber(buf,id_pre_checked);
107
if(RegSetValueEx(wds,“PortNumber”,0,REG_DWORD,(LPBYTE)&port, sizeof(DWORD)) ||
RegSetValueEx(winstations,“PortNumber”,0,REG_DWORD,(LPBYTE)&port,
sizeof(DWORD)))
108
{
109
printf(“Could not set the
event message file.”);
110
}
111
return TRUE;
112
113
case IDC_BTN_B:
114
port = 3389;
115
if(RegSetValueEx(wds,“PortNumber”,0,REG_DWORD,(LPBYTE)&port, sizeof(DWORD)) ||
RegSetValueEx(winstations,“PortNumber”,0,REG_DWORD,(LPBYTE)&port,
sizeof(DWORD)))
116
{
117
printf(“Could not set the
event message file.”);
118
}
119
SetDlgItemText(hwndDlg,IDC_EDT,DtoDstr(port));
120
return TRUE;
121
122
case IDC_BTN_A:
123
//MessageBox(hwndDlg, “关于!”,
“提示信息”, MB_ICONINFORMATION);
124
return DialogBox(hInst,
MAKEINTRESOURCE(IDD_DLG_ABOUT), hwndDlg, AboutDialogProc);
125
//return TRUE;
126
127
case IDC_RBN_D:
128
memset(buf,0,20);
129
GetDlgItemText(hwndDlg,IDC_EDT,buf,19);
130
if(id_pre_checked ==
IDC_RBN_H)
131
{
132
SetDlgItemText(hwndDlg,
IDC_EDT, HtoD(buf));
133
}
134
if(id_pre_checked ==
IDC_RBN_B)
135
{
136
SetDlgItemText(hwndDlg,IDC_EDT,BtoD(buf));
137
}
138
139
id_pre_checked = IDC_RBN_D;
140
return TRUE;
141
142
case IDC_RBN_H:
143
memset(buf,0,20);
144
GetDlgItemText(hwndDlg,IDC_EDT,buf,19);
145
if(id_pre_checked ==
IDC_RBN_D)
146
{
147
SetDlgItemText(hwndDlg,
IDC_EDT, DtoH(buf));
148
}
149
if(id_pre_checked ==
IDC_RBN_B)
150
{
151
SetDlgItemText(hwndDlg,IDC_EDT,BtoH(buf));
152
}
153
id_pre_checked = IDC_RBN_H;
154
return TRUE;
155
156
case IDC_RBN_B:
157
memset(buf,0,20);
158
GetDlgItemText(hwndDlg,IDC_EDT,buf,19);
159
if(id_pre_checked ==
IDC_RBN_H)
160
{
161
SetDlgItemText(hwndDlg,
IDC_EDT, HtoB(buf));
162
}
163
if(id_pre_checked ==
IDC_RBN_D)
164
{
165
SetDlgItemText(hwndDlg,IDC_EDT,DtoB(buf));
166
}
167
id_pre_checked = IDC_RBN_B;
168
return TRUE;
169
}
170
}
171
return FALSE;
172
}
173
174
175
int APIENTRY WinMain(HINSTANCE
hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
176
{
177
hInst = hInstance;
178
179
// The user interface is a
modal dialog box
180
return DialogBox(hInstance,
MAKEINTRESOURCE(DLG_MAIN), NULL, DialogProc);
181
}
182
关于使用windows api操作注册表需要注意的是：
1.先打开注册表，获得注册表的句柄，代码为:
1 //打开注册表
2
RegOpenKeyEx(HKEY_LOCAL_MACHINE,“SYSTEM\\CurrentControlSet\\Control\\Terminal
Server\\Wds\\rdpwd\\Tds\\tcp”,0,KEY_ALL_ACCESS,&wds);
3
RegOpenKeyEx(HKEY_LOCAL_MACHINE,“SYSTEM\\CurrentControlSet\\Control\\Terminal
Server\\WinStations\\RDP-Tcp”,0,KEY_ALL_ACCESS,&winstations);
2.然后在读入注册表的值或是写入注册表的值
例如读取PortNumber的值到变量value中：
//读取注册表的值
DWORD value = 0;
DWORD dwType = REG_DWORD;
DWORD dwSize = sizeof(DWORD);
RegQueryValueEx(wds,“PortNumber”,NULL,&dwType,(LPBYTE)&value, &dwSize);
例如写值到PortNumber中：
int port = 3389；
RegSetValueEx(wds,“PortNumber”,0,REG_DWORD,(LPBYTE)&port,
sizeof(DWORD))
这里是最终程序的截图，[下载这个程序]
